Question

Please help!
Find the value of x for which ABCD must be a parallelogram.

Answer 1

5

Explanation:

cause

angle c and angle a are alternate angle and alternate angle are always equal so 5X-8=2x+7

5x-2x=7+8

3x=15

or x=5

Answer 2

x=5

Explanation:

5x-8=2x+7

5x-2x=7+8

3x=15

X=15/3

x=5