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12(x+2)-7=7(3x-4)
We move all terms to the left:
12(x+2)-7-(7(3x-4))=0
We multiply parentheses
12x-(7(3x-4))+24-7=0
We calculate terms in parentheses: -(7(3x-4)), so:We add all the numbers together, and all the variables
7(3x-4)
We multiply parentheses
21x-28
Back to the equation:
-(21x-28)
12x-(21x-28)+17=0
We get rid of parentheses
12x-21x+28+17=0
We add all the numbers together, and all the variables
-9x+45=0
We move all terms containing x to the left, all other terms to the right
-9x=-45
x=-45/-9
x=+5
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