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x+7-2(-9x-1)=7(x-1)
We move all terms to the left:
x+7-2(-9x-1)-(7(x-1))=0
We multiply parentheses
x+18x-(7(x-1))+2+7=0
We calculate terms in parentheses: -(7(x-1)), so:We add all the numbers together, and all the variables
7(x-1)
We multiply parentheses
7x-7
Back to the equation:
-(7x-7)
19x-(7x-7)+9=0
We get rid of parentheses
19x-7x+7+9=0
We add all the numbers together, and all the variables
12x+16=0
We move all terms containing x to the left, all other terms to the right
12x=-16
x=-16/12
x=-1+1/3
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