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5(x+7)=4(1-x)
We move all terms to the left:
5(x+7)-(4(1-x))=0
We add all the numbers together, and all the variables
5(x+7)-(4(-1x+1))=0
We multiply parentheses
5x-(4(-1x+1))+35=0
We calculate terms in parentheses: -(4(-1x+1)), so:We get rid of parentheses
4(-1x+1)
We multiply parentheses
-4x+4
Back to the equation:
-(-4x+4)
5x+4x-4+35=0
We add all the numbers together, and all the variables
9x+31=0
We move all terms containing x to the left, all other terms to the right
9x=-31
x=-31/9
x=-3+4/9
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