30a+10+5a-2=78

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Solution for 30a+10+5a-2=78 equation: 



30a+10+5a-2=78

We move all terms to the left:

30a+10+5a-2-(78)=0

We add all the numbers together, and all the variables

35a-70=0

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

35a=70

a=70/35

a=2

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