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7+4x=(7x-2(x+5))+5
We move all terms to the left:
7+4x-((7x-2(x+5))+5)=0
We calculate terms in parentheses: -((7x-2(x+5))+5), so:We get rid of parentheses
(7x-2(x+5))+5
We calculate terms in parentheses: +(7x-2(x+5)), so:We get rid of parentheses
7x-2(x+5)
We multiply parentheses
7x-2x-10
We add all the numbers together, and all the variables
5x-10
Back to the equation:
+(5x-10)
5x-10+5
We add all the numbers together, and all the variables
5x-5
Back to the equation:
-(5x-5)
4x-5x+5+7=0
We add all the numbers together, and all the variables
-1x+12=0
We move all terms containing x to the left, all other terms to the right
-x=-12
x=-12/-1
x=+12
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