For the following system, if you isolated x in the second equation to use the substitution method, what expression would you substitute into the first equation?

3x + y = 8

-x - 2y = - 10

A.) - 2y + 10

B.) 2y + 10

C.) 2y - 10

D.) - 2y - 10

Question

Luka Odonnell

12 September, 20:13

+2

Answers (1)

Know the Answer?

Kaylyn Crosby · Answer 1

A.) - 2y + 10

Step-by-step explanation:

-x - 2y = - 10

Add 2y to both sides.

-x = 2y - 10

Multiply both sides by - 1.

x = - 2y + 10

For the following system, if you isolated x in the second equation to use the substitution method, what expression would you substitute into the first equation?3x + y = 8-x - 2y = - 10A.) - 2y + 10B.) 2y + 10C.) 2y - 10D.) - 2y - 10