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-3(-5x-3)+2x+4=81
We simplify the equation to the form, which is simple to understand
-3(-5x-3)+2x+4=81
Reorder the terms in parentheses
+(+15x+9)+2x+4=81
Remove unnecessary parentheses
+15x+9+2x+4=+81
We move all terms containing x to the left and all other terms to the right.
+15x+2x=+81-9-4
We simplify left and right side of the equation.
+17x=+68
We divide both sides of the equation by 17 to get x.
x=4
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