Solve using double substitution y=x-7 y=-2x+8

asked May 21, 2019 234k views

1 vote

Solve using double substitution

y=x-7
y=-2x+8

by Mago

5.4k points

Please log in or register to add a comment.

5 votes

Answer:

(5, -2)

Explanation:

x - 7 = -2x + 8

add 2x to both sides

x - 7 + 2x = -2x + 8 + 2x

3x - 7 = 8

Add 7 to both sides

3x - 7 + 7 = 8 + 7

3x = 15

x = 5

y = 5 - 7

y = -2

Solution (5, -2)

Matt Nelson answered May 26, 2019

5.0k points

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

6.0m questions

7.8m answers