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135+(4x+3)=166
We move all terms to the left:
135+(4x+3)-(166)=0
We add all the numbers together, and all the variables
(4x+3)-31=0
We get rid of parentheses
4x+3-31=0
We add all the numbers together, and all the variables
4x-28=0
We move all terms containing x to the left, all other terms to the right
4x=28
x=28/4
x=7
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