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

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.

That they are numbers and related to each other.

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