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5(-7-2x)=9(-4-x)
We move all terms to the left:
5(-7-2x)-(9(-4-x))=0
We add all the numbers together, and all the variables
5(-2x-7)-(9(-1x-4))=0
We multiply parentheses
-10x-(9(-1x-4))-35=0
We calculate terms in parentheses: -(9(-1x-4)), so:We get rid of parentheses
9(-1x-4)
We multiply parentheses
-9x-36
Back to the equation:
-(-9x-36)
-10x+9x+36-35=0
We add all the numbers together, and all the variables
-1x+1=0
We move all terms containing x to the left, all other terms to the right
-x=-1
x=-1/-1
x=1
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