Question

Find the solution of the system of equation.
y-x=-13
-4x+3y=-51

Answer 1

I would use elimination here

I would start by multiplying the first equation by -4

-4y + 4x = 52
-4x+3y=-51

Answer 2

then I would add them together

Answer 3

4x - 4x = 0

-4y + 3y = 1

y = ?

Answer 4

y=-1?

Answer 5

good

Answer 6

now, if y = -1 then we can use our first equation to find x

(-1)-x=-13

Answer 7

x = ?

Answer 8

so would it be (-12,-1)?

Answer 9

should be (12,-1)

Answer 10

oh ok i just re-did it and got it when u said that :D

Answer 11

so how would u set up this equation?

Answer 12

if there are 3 times as many men as women then:

m = 3*w

and if there are 48 people then m + w = 48

Answer 13

know how to solve this?

Answer 14

umm... would u multiply the first equation by 48?

Answer 15

you don't need to

Answer 16

no wait...

Answer 17

since it already tells you what m is equal to, you can replace "m" with "3w" whenever shows up

Answer 18

would it be x+15x=48?

Answer 19

where are you getting 15 from?

Answer 20

where are you getting x from?

Answer 21

instead of w

Answer 22

w = ?

Answer 23

m sorry im tired lol

Answer 24

16m=48
m=48/16=3
men = 15(3) = 45
Am I right?

Answer 25

after you substitute m = 3w into the equation you shouldn't have m anymore

Answer 26

3w + w = 48


w = ?

Answer 27

12?

Answer 28

good

Answer 29

so if w = 12 and m = 3*w what is m?

Answer 30

36

Answer 31

oh wait >_> I read the question wrong :S

Answer 32

it should be m = 15w

Answer 33

so 15w + w = 48
so w = 3 and m = 45 :S

Answer 34

so it would be 45? or was i still wrong

Answer 35

yeah it's 45

Answer 36

oh sweet

Answer 37

are u good at inequalities

Answer 38

are u good at inequalities

Answer 39

sure

Answer 40

lol sorry if im asking u a lot i need to get this done and i saved all the stuff idk for the end

Answer 41

sure, just post a new question and i'll take a shot at it

Answer 42

ok