8x+4y=-20 and -4x-8y=-20 solve each system by substitution

Question

asked May 23, 2017 216k views

1 Answer

Lusc · Answer 1 · 2017-05-27T10:00:14+0000

8x + 4y = -20
4y = -20 - 8x
y = -5 -2x

-4x - 8y = -20
-4x - 8(-5-2x) = -20
-4x + 40 + 16x = -20
12x = -60
x = -5

8(-5) + 4y = -20
-40 + 4y = -20
4y = 20
y = 5

8x+4y=-20 and -4x-8y=-20 solve each system by substitution

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

Please log in or register to add a comment.

No related questions found

Categories

Other Questions