Solve for x. Please look at the picture and answer it. Thank you.

Answer:
[tex]\tt x=21[/tex]
Step-by-step explanation:
[tex]\tt 45+63+4x-12=180[/tex]
[tex]\tt \cfrac{4x}{4} =\cfrac{180-96}{4}[/tex]
[tex]\tt x=21[/tex]
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