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2(1+7x)=58
We move all terms to the left:
2(1+7x)-(58)=0
We add all the numbers together, and all the variables
2(7x+1)-58=0
We multiply parentheses
14x+2-58=0
We add all the numbers together, and all the variables
14x-56=0
We move all terms containing x to the left, all other terms to the right
14x=56
x=56/14
x=4
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