3(5)-a=12

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Solution for 3(5)-a=12 equation: 



3(5)-a=12

We move all terms to the left:

3(5)-a-(12)=0

We add all the numbers together, and all the variables

-1a+23=0

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

-a=-23

a=-23/-1

a=+23

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