3a+2a+90=180

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Solution for 3a+2a+90=180 equation: 



3a+2a+90=180

We move all terms to the left:

3a+2a+90-(180)=0

We add all the numbers together, and all the variables

5a-90=0

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

5a=90

a=90/5

a=18

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