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172=-7x-3(4x+6)
We simplify the equation to the form, which is simple to understand
172=-7x-3(4x+6)
Reorder the terms in parentheses
172=-7x+(-12x-18)
Remove unnecessary parentheses
+172=-7x-12x-18
We move all terms containing x to the left and all other terms to the right.
+7x+12x=-18-172
We simplify left and right side of the equation.
+19x=-190
We divide both sides of the equation by 19 to get x.
x=-10
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