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3(2i+7)=6i+12
We move all terms to the left:
3(2i+7)-(6i+12)=0
We multiply parentheses
6i-(6i+12)+21=0
We get rid of parentheses
6i-6i-12+21=0
We add all the numbers together, and all the variables
9!=0
There is no solution for this equation
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