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a=a*2+18/4
We move all terms to the left:
a-(a*2+18/4)=0
We add all the numbers together, and all the variables
a-(+a*2+18/4)=0
We get rid of parentheses
a-a*2-18/4=0
We multiply all the terms by the denominator
a*4-(a*2)*4-18=0
We add all the numbers together, and all the variables
a*4-(+a*2)*4-18=0
We multiply parentheses
a*4-8a-18=0
Wy multiply elements
4a-8a-18=0
We add all the numbers together, and all the variables
-4a-18=0
We move all terms containing a to the left, all other terms to the right
-4a=18
a=18/-4
a=-4+1/2
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