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12(3+a)=14
We move all terms to the left:
12(3+a)-(14)=0
We add all the numbers together, and all the variables
12(a+3)-14=0
We multiply parentheses
12a+36-14=0
We add all the numbers together, and all the variables
12a+22=0
We move all terms containing a to the left, all other terms to the right
12a=-22
a=-22/12
a=-1+5/6
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