Answer:
The answer to your question is x = 2.5
Explanation:
We know that lines r and s are parallel so angles 1 and 2 are corresponding angles. Corresponding angles measure the same.
m∠1 = m∠2
Substitution
40 - 4x = 50 - 8x
Solve for x
8x - 4x = 50 - 40
4x = 10
x = 10/4
x = 2.5