Answer:
Explanation:
factor
9x - 9
9(x - 1)
9(x - 1) = 90 degrees
divide both sides by 10
x-1 = 10
simplify
x = 11
We Know
A right angle is 90°, and the (9x - 9) is a right angle.
Solve for x
9x - 9 = 90
9x = 99
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