3(6a+12)=90

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Solution for 3(6a+12)=90 equation:



3(6a+12)=90
We move all terms to the left:
3(6a+12)-(90)=0
We multiply parentheses
18a+36-90=0
We add all the numbers together, and all the variables
18a-54=0
We move all terms containing a to the left, all other terms to the right
18a=54
a=54/18
a=3

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