First, we should figure out an equation and take note that we are dealing with complementary angles (angles that add up to 90 degrees)
Your equation:
(2x + 1) + (x - 7) = 90
Now solve!
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SOLVING...
(2x + 1) + (x - 7) = 90
Simplify and combine like terms
2x + 1 + x −7 = 90
2x + 1 + x + −7 = 90
(2x + x) + (1 + −7) = 90
3x + −6 = 90
Add 6 to each side
3x − 6 + 6 = 90 + 6
3x = 96
Divide each side by 3
3x ÷ 3 = 96 ÷ 3
x = 32