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(11a+3)-18a=4
We move all terms to the left:
(11a+3)-18a-(4)=0
We add all the numbers together, and all the variables
-18a+(11a+3)-4=0
We get rid of parentheses
-18a+11a+3-4=0
We add all the numbers together, and all the variables
-7a-1=0
We move all terms containing a to the left, all other terms to the right
-7a=1
a=1/-7
a=-1/7
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