Explanation:
This is a parallelogram, the parallel sides are congruent.
So we can write the following equation to find the value of k:
13k - 9 = 5k + 7
- Transfer like terms to the same side of the equation.
13k - 5k = 7 + 9
- Add/Subtract expressions.
8k = 16
k = 2
Consecutive angles are supplementary, which means they add up to 180:
12j - 41 + 5j - 17 = 180
17j - 58 = 180
17j = 238
j = 14