I can't solve x=-4y

3x+2y=20

Question

Mathematics

Hugh Hebert

1 March, 05:55

I can't solve x=-4y

3x+2y=20

+2

Answers (2)

Know the Answer?

Thomas Melendez · Answer 1

X = - 4y

3x+2y=20

Now you see that you are given the value of 1 variable (x) so you can sub it into the second equation, and then solve as usual.

3 (-4y) + 2y=20

-12y+2y=20

-10y=20

-10y/-10=20/-10

y=-2

Turner Neal · Answer 2

The answer is - 2 because

x=-4y

plug in - 4y where x is in the equation

3 (-4y) + 2y=20

then multiply - 4 and 3 which equals - 12

so now you have - 12y+2y=20

combine like terms

-10y=20

now you solve

20/-10=-2

I can't solve x=-4y3x+2y=20

I can't solve x=-4y

3x+2y=20