If all the angles add up to 90 degrees then you can set the equation 7x-9*2x=90
Simplify
9x-9=90
Plus 9 both sides
9x=99
Divide by 9 on both sides
X=11
i hope this helps you......
Answer:

Step-by-step explanation:
can be broken down into three fractions, coefficients, powers of p, powers of q.

Simplify the first fraction, then simplify the others by subtracting numerator exponents minus denominator exponents.

Answer:well I will tell if you tell me the answer for my question
Step-by-step explanation:
The answer is b -9 < x < 12