Question

Find the value of x
a:14
b:23
c:34
d:56

Answer 1

The angle is a right angle so that means (3x - 9) + (x + 7) will add up to 90°.

(3x - 9) + (x + 7) = 90
Combine like terms.

4x - 2 = 90
Add 2 to both sides.

4x = 92
Divide both sides by 4.

x = 23
b) 23 is your answer.

Answer 2

4x - 2 = 90°
4x = 92
x = 23

B