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124=-2+7x
We move all terms to the left:
124-(-2+7x)=0
We add all the numbers together, and all the variables
-(7x-2)+124=0
We get rid of parentheses
-7x+2+124=0
We add all the numbers together, and all the variables
-7x+126=0
We move all terms containing x to the left, all other terms to the right
-7x=-126
x=-126/-7
x=+18
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