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-5(1+x)=7(1-x)
We move all terms to the left:
-5(1+x)-(7(1-x))=0
We add all the numbers together, and all the variables
-5(x+1)-(7(-1x+1))=0
We multiply parentheses
-5x-(7(-1x+1))-5=0
We calculate terms in parentheses: -(7(-1x+1)), so:We get rid of parentheses
7(-1x+1)
We multiply parentheses
-7x+7
Back to the equation:
-(-7x+7)
-5x+7x-7-5=0
We add all the numbers together, and all the variables
2x-12=0
We move all terms containing x to the left, all other terms to the right
2x=12
x=12/2
x=6
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