I can't solve x=-4y

3x+2y=20

Question

Eliza Hammond

Mathematics

3 July, 18:22

I can't solve x=-4y

3x+2y=20

+5

Answers (2)

Know the Answer?

Braelyn Norris · Answer 1

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

Iyana Freeman · Answer 2

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

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

I can't solve x=-4y

3x+2y=20