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6x+450=7(50+x)
We move all terms to the left:
6x+450-(7(50+x))=0
We add all the numbers together, and all the variables
6x-(7(x+50))+450=0
We calculate terms in parentheses: -(7(x+50)), so:We get rid of parentheses
7(x+50)
We multiply parentheses
7x+350
Back to the equation:
-(7x+350)
6x-7x-350+450=0
We add all the numbers together, and all the variables
-1x+100=0
We move all terms containing x to the left, all other terms to the right
-x=-100
x=-100/-1
x=+100
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