Question

Use substitution to solve the system of equations. Enter your answer as an ordered pair; example: (4, -5)
y = 3x + 5
x = -3y - 5

Answer 1

Take y from the first equation substitute it in the second equation and solve for x. Then put x value in one of the equations and find y.

Answer 2

x=-3(-5)+5
x=-15+5
x=-10

I think that's half of the steps right there.

Answer 3

ooo i see

Answer 4

so then you would put -10 into the y solution

Answer 5

Yep I think so

Answer 6

so y=3(-10)+5

Answer 7

y=-25

Answer 8

actually I just realized. That was an example, it is not actually used in the problem

Answer 9

the ordered pair (4,5) is not used so what would you do now??

Answer 10

I think you are supposed to use x which is 4 in the problem to? I can't remember but. Yeah just plug -10 in and I think you are good!

Answer 11

Then you find x and y

Answer 12

I believe you would do something like x= -3(3x+5)-5

Answer 13

nope....
Enter your answer as an ordered pair; example: (4, -5)
the ordered pair is only an example to how to present ur answer...

substitution is
y = 3x + 5
x = -3y - 5

x = -3(3x + 5) -5

then solve it

Answer 14

Ah ok sorry about that.

Answer 15

Yes I thought it was that :p

Answer 16

so x=-9x-20?

Answer 17

yep!

Answer 18

nway... u got the correct idea... that's the important part...

Answer 19

so then how would you put it into an ordered pair solution o.o

Answer 20

You solve for x first. Then find y. Put it as (x, y) and that is how you put it as an ordered pair.
What are you getting for x?

Answer 21

ordered pair ---- (x value , y value )

Answer 22

Yes but how do you just seclude it to one number if this is what you get for x x=-9x-20?

Answer 23

solve it for x

Answer 24

Oh, you have to solve for x
x = -9x - 20
Add 9x to both sides. What do you get?

Answer 25

x + 9x = -20
10x = -20
x = ?

Answer 26

x=2

Answer 27

well that was a facepalm moment *facepalm*

Answer 28

watch out for the sign

Answer 29

u have messed up with -,+signs

Answer 30

-2

Answer 31

yep

Answer 32

so y=3(-2)+5

Answer 33

go on...

Answer 34

OK. Put x = -2 in any one of the equations and find y. What do you get for y?

Answer 35

-6+5 is -1 y=-1

Answer 36

yep

Answer 37

Now put it as an ordered pair

Answer 38

so (-2,-1)

Answer 39

ya got it!!

Answer 40

Yes!

Answer 41

:D

Answer 42

Thank you guys

Answer 43

If I could give more than one best response >.<

Answer 44

u r welcome !!

Answer 45

ranga --> darkblue
me ---> ranga

best response

Answer 46

Could You help me with some more. Because like this is all about system of equations and its not my best point of algebra

Answer 47

ok... sure if i can

Answer 48

Alright Thank you >.< I just have issues in this part of algebra

Answer 49

Classify the system and determine the number of solutions. (Check all that apply.)
$x - 2y = -8$
$4x = 8y - 56$


inconsistent
consistent
no solution
infinitely many solutions

Answer 50

ignore the dollar signs haha

Answer 51

x=2y-14

Answer 52

is there any specific way to solve this ....like using substitution... or can we solve it by any method?

Answer 53

By any method I believe saying it doesn't say a specific type

Answer 54

x=2y-14 -----(1)


x - 2y = -8
x = 2y - 8 -----(2)

so....
no solutions...
(1) = (2)
2y -14 = 2y -8

y will cancel out.. u can't solve this one...

Answer 55

so no solution and inconsistent

Answer 56

yep

Answer 57

Thank you again :3

Use substitution to solve the system of equations. Enter your answer as an ordered pair; example: (4, -5)
5x + 6y = -9
2x - 2 = -y

With this one can you just correct me if I get it wrong :p

Answer 58

y=-2x+2

Answer 59

correct

Answer 60

5x=6y+9

x=1.2y+1.8

Answer 61

or do you put y in before you divide it by 5

Answer 62

use substitution

Answer 63

5x = 6(-2x+2) + 9

Answer 64

-12x+12+9

Answer 65

-2.4x+2.4+1.8

Answer 66

x=-2.4x+4.2

Answer 67

3.4x=4.2

Answer 68

-3.4*

Answer 69

I get a repeating number

Answer 70

5x + 6y = -9
5x + 6(-2x+2) = -9
5x - 12x + 12 = -9
-7x = -21
x = 3

u have miss the step here
5x + 6y = -9 ----- > 5x = 6y - 9 ; it should be 5x = -6y - 9

Answer 71

so 12x-12+9

Answer 72

12x-3

Answer 73

12x -12-9

Answer 74

12x - 21

Answer 75

*facepalm*

Answer 76

lol

Answer 77

7x=-21

Answer 78

x=-3

Answer 79

nope

Answer 80

5x = 12x - 21
5x - 12 x = -21
-7x = -21

Answer 81

UHG *flips table* CURSE YOU NEGATIVES

Answer 82

so x= 3

Answer 83

yeah!!

Answer 84

2(3)-2=y

Answer 85

6-2=4 y=4

Answer 86

(3,4)

Answer 87

y = -2x + 2
= -2(3) + 2
= -6 + 2
= -4

Answer 88

._.

Answer 89

Its official my mind hates me

Answer 90

(3,-4)

Answer 91

yes!!!

Answer 92

Haha Thank you again and sorry for my negative troubles >.<

Answer 93

Classify the system and determine the number of solutions. (Check all that apply.)
$8x + 12y = 60$
$2x + 3y = -24$


no solution
consistent
inconsistent
infinitely many solutions

Answer 94

again sorry about the dollar signs ._.

Answer 95

no problem... but watch out for negatives...

Answer 96

2x = -24 - 3y

8x + 12y = 60
4(2x) + 12y = 60
4(-24 - 3y) + 12y = 60
-96 -12y + 12 y = 60

so...
it's the same as before....

Answer 97

Now substitution ._.

Use elimination to solve the system of equations. Enter your answer as an ordered pair; example: (4, -5)
1/2x+y=4
-2x-2y=-6

Answer 98

Also I really appreciate your help :3 Thank you