3a-30+2a=85

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Solution for 3a-30+2a=85 equation: 



3a-30+2a=85

We move all terms to the left:

3a-30+2a-(85)=0

We add all the numbers together, and all the variables

5a-115=0

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

5a=115

a=115/5

a=23

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