Answer:
x = -13
Step-by-step explanation:
Distribute:
8 - 6x + 10x - 15 = 20 - 5x
Combine like terms:
4x - 7 = 20 - 5x
Isolate Variable
-x = 13
-1(-x) = -1(13)
x = -13
She could measure the next length to the left or right and she will have all 4 sides because a rectangle has 2 sets of equal sides.
I believe the correct answer is a hope this helps
