12-5a=7

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Solution for 12-5a=7 equation: 



12-5a=7

We move all terms to the left:

12-5a-(7)=0

We add all the numbers together, and all the variables

-5a+5=0

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

-5a=-5

a=-5/-5

a=1

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