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99=3 (x+8)+12x
We simplify the equation to the form, which is simple to understand
99=3(x+8)+12x
Reorder the terms in parentheses
99=+(+3x+24)+12x
Remove unnecessary parentheses
+99=+3x+24+12x
We move all terms containing x to the left and all other terms to the right.
-3x-12x=+24-99
We simplify left and right side of the equation.
-15x=-75
We divide both sides of the equation by -15 to get x.
x=5
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