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7(2x+1)+3=150
We move all terms to the left:
7(2x+1)+3-(150)=0
We add all the numbers together, and all the variables
7(2x+1)-147=0
We multiply parentheses
14x+7-147=0
We add all the numbers together, and all the variables
14x-140=0
We move all terms containing x to the left, all other terms to the right
14x=140
x=140/14
x=10
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