Find the value of x.
A.) 34
B.)23
C.)56
D.)14

The whole thing = 180 and the left side = 90 so the right must be equal to 90.

Using this info, we can combine so (3x - 9) + ( x + 7) = 4x - 2.

4x - 2 is equal to 90 as that is the right side. So we have to use the different properties of equality.

4x - 2 = 90
+ 2 + 2

4x/4 = 92/4

X = 23! So the answer is B.

What do you mean by that?

Cis the correct answer choice