Answer:
x=10
Step-by-step explanation:
Adjacent angles in a parallelogram are supplementary so they add to 180 degrees. So
∠A+ ∠B=180
Substitute 8x+2 in for ∠A, and 9x+8 in for ∠B
8x+2+9x+8=180
Combine like terms
8x+9x+8+2=180
17x+10=180
Subtract 10 from both sides
17x=170
Divide by 17 on both sides
x=10
Hope this helps! :)
