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-151=2x-7(x+18)
We move all terms to the left:
-151-(2x-7(x+18))=0
We calculate terms in parentheses: -(2x-7(x+18)), so:We get rid of parentheses
2x-7(x+18)
We multiply parentheses
2x-7x-126
We add all the numbers together, and all the variables
-5x-126
Back to the equation:
-(-5x-126)
5x+126-151=0
We add all the numbers together, and all the variables
5x-25=0
We move all terms containing x to the left, all other terms to the right
5x=25
x=25/5
x=5
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