3a+45=180

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Solution for 3a+45=180 equation: 



3a+45=180

We move all terms to the left:

3a+45-(180)=0

We add all the numbers together, and all the variables

3a-135=0

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

3a=135

a=135/3

a=45

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