help on math problem?

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Er, what exactly are you supposed to find? value of x? value of y? coordinate table thing? Please give more information....Show more

1. -2x+y=4
y=2x+4
2.8x+2y=-6
2y=8x-6
y=4x-3
3.x-3y=12
-3y=x+12
y=-1/3x-4...Show more

well if youre trying to get them into y = mx + b form, i can help.

but you werent very specific.

so i guess the first one, just add the 2x to both sides. y = 2x + 4.

the second one, subtract the 8x. 2y = -8x - 6. then divide a 2 out of everything, giving you y = -4x- 3

finally, subtract the x on the last one. then divide by -3. the answer to this one is y = 1/3x + 4...Show more

1) -2x + y = 4
-2x + 2x + y = 4 + 2x
y = 4 + 2x

2) 8x - 8x + 2y = - 6 - 8x
2y = - 6 - 8x
y = (-6 - 8x)/2
y = -3 - 4x

3) x - 3y = 12
x - x - 3y = 12 - x
-3y = 12 - x
y = -4 - 1/3(x)

There!...Show more

-2x+y=4, make the equation equal to y.
add 2x to both sides.
that will equal y=2x+4
you have what Y equals, then, you substitute the y in the third equation for (2x+4) that will look like this
x-3(2x+4)=12. you did this, because you want to get only one variable in one equation. you solve that, then when you get the answer
it will be x= ? and then you can plug the number for x in place of the variable in the third equation...Show more