12a+5-8a=13

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Solution for 12a+5-8a=13 equation: 



12a+5-8a=13

We move all terms to the left:

12a+5-8a-(13)=0

We add all the numbers together, and all the variables

4a-8=0

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

4a=8

a=8/4

a=2

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