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3a-116=7a/9+4
We move all terms to the left:
3a-116-(7a/9+4)=0
We get rid of parentheses
3a-7a/9-4-116=0
We multiply all the terms by the denominator
3a*9-7a-4*9-116*9=0
We add all the numbers together, and all the variables
-7a+3a*9-1080=0
Wy multiply elements
-7a+27a-1080=0
We add all the numbers together, and all the variables
20a-1080=0
We move all terms containing a to the left, all other terms to the right
20a=1080
a=1080/20
a=54
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