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4x+9=5(x+1)-7
We move all terms to the left:
4x+9-(5(x+1)-7)=0
We calculate terms in parentheses: -(5(x+1)-7), so:We get rid of parentheses
5(x+1)-7
We multiply parentheses
5x+5-7
We add all the numbers together, and all the variables
5x-2
Back to the equation:
-(5x-2)
4x-5x+2+9=0
We add all the numbers together, and all the variables
-1x+11=0
We move all terms containing x to the left, all other terms to the right
-x=-11
x=-11/-1
x=+11
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