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8x-12x=2(x+9)+4(x-12)
We simplify the equation to the form, which is simple to understand
8x-12x=2(x+9)+4(x-12)
Reorder the terms in parentheses
8x-12x=+(+2x+18)+4*(x-12)
Remove unnecessary parentheses
+8x-12x=+2x+18+4+*(+x-12+)
Reorder the terms in parentheses
8x-12x=+2x+18+(+4x-48)
Remove unnecessary parentheses
+8x-12x=+2x+18+4x-48
We move all terms containing x to the left and all other terms to the right.
+8x-12x-2x-4x=+18-48
We simplify left and right side of the equation.
-10x=-30
We divide both sides of the equation by -10 to get x.
x=3
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