2a-45+a-12+2a-18=180

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Solution for 2a-45+a-12+2a-18=180 equation: 



2a-45+a-12+2a-18=180

We move all terms to the left:

2a-45+a-12+2a-18-(180)=0

We add all the numbers together, and all the variables

5a-255=0

We move all terms containing a to the left, all other terms to the right

5a=255

a=255/5

a=51

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