Question

Find the solution to each system by the substitution method.

2x-5y=-1
x-3y=-3

Answer 1

2x-5y=-1
x-3y=-3 (-2)


2x -5y =-1
-2x +6y = 6
------------
y = 5

Answer 2

smells like teen spirit here

Answer 3

x = 12; y=5

Answer 4

to sub tho is to find a 'value' from one equation and substitute it in the other to get a solid value

Answer 5

its very labor intensive .... but works

Answer 6

or use a matrix

Answer 7

and matlab

Answer 8

cannot use matrix on this

Answer 9

I know, in regard to it being labor intensive

Answer 10

2x-5y=-1
x-3y=-3 <-- x = 3y-3


2x-5y=-1

2(3y-3)-5y=-1

6y -6-5y =-1

y = 5 .... lol

Answer 11

x = 3y-3

x = 3(5)-3

x = -15+3

x = -12

Answer 12

very much labor inducing lol

Answer 13

haha for real

Answer 14

ive seen enough facoring type questions.. i want to see integration

Answer 15

This was very confusing.

Answer 16

its like using a chain rule for solving equations....

Answer 17

x = 'value'; use x in other equation:

y = 'real value'; use in other equation

x = real value

Answer 18

Another on one.

10x+3y=-8
2x+y=2

Answer 19

I'm going to try to do it on my end

Answer 20

good girl

Answer 21

a lot of ppl here don't try

Answer 22

y = -2x+2 .... use it in other equaiton

10x +3(-2x+2) = -8

10x -6x +6 = -8

16x = -14

x = -7/8

Answer 23

use x value in other equation to solve for y

y = -2(-7/8)+2

y = 7/4 +2

y = 15/4

Answer 24

Thanks. But you have to try because if not you aren't learning anything just getting answers.

Answer 25

10x+3y=-8
2x+y=2 (-3)

10x+3y=-8
-6x -3y=-6
-----------
4x = -14

x = -7/2 ..... lol

Answer 26

actually, we will be doing the elimination

Answer 27

i added wrong last time lol 10-6 = 16? what a farce

Answer 28

2x -7/2 = 2

4x -7 = 4

4x = 11

x = 11/4

Answer 29

just shoot me lol

Answer 30

2(-7/2) +y = 2

-7 +y = 2

y = 9 .... and that my final offer lol

Answer 31

thatll teach ya to ask 2 questions in one post ;)

Answer 32

lol... I'm trying to figure it out and you guys keep going. AHHHHH

Answer 33

2x-5y=-1
(x-3y=-3)*-2 ----> -2x+6y=6
then add, y=5

2x-5y=-1
2x-5(5)=-1
2x-25=-1
2x=25-1
2x=24
x=12

Answer 34

The answer is x=12 and y=5

Answer 35

i hope this helps.

Answer 36

dbl check

10x+3y=-8
10(-7/2) +3(9) = -8
-35 + 27 = -8
-8 = -8 ...... thats good


2x+y=2
2(-7/2) +(9) = 2
-7 +9 = 2
2 = 2 ....... thats good

x = -7/2 and y = 9

Answer 37

yeah i had a -12 up top eh.. silly me lol

Answer 38

is this your answers?