12-5a=-13

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Solution for 12-5a=-13 equation: 



12-5a=-13

We move all terms to the left:

12-5a-(-13)=0

We add all the numbers together, and all the variables

-5a+25=0

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

-5a=-25

a=-25/-5

a=+5

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