Answer and Step-by-step explanation:
We are given a linear pair. The angles of a linear pair add up to 180.
To find x, add the two angles together and equal it to 180, then solve for x.
126 + x + 23 = 180
Simplify.
149 + x = 180
Subtract both sides of the equation by 149.
x = 31
x = 31 is the answer.
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