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13=-3(x-4)-8
We simplify the equation to the form, which is simple to understand
13=-3(x-4)-8
Reorder the terms in parentheses
13=+(-3x+12)-8
Remove unnecessary parentheses
+13=-3x+12-8
We move all terms containing x to the left and all other terms to the right.
+3x=+12-8-13
We simplify left and right side of the equation.
+3x=-9
We divide both sides of the equation by 03 to get x.
x=-3
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