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12+2x=3(-1x+2)-19
We move all terms to the left:
12+2x-(3(-1x+2)-19)=0
We calculate terms in parentheses: -(3(-1x+2)-19), so:We get rid of parentheses
3(-1x+2)-19
We multiply parentheses
-3x+6-19
We add all the numbers together, and all the variables
-3x-13
Back to the equation:
-(-3x-13)
2x+3x+13+12=0
We add all the numbers together, and all the variables
5x+25=0
We move all terms containing x to the left, all other terms to the right
5x=-25
x=-25/5
x=-5
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