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90=-3(4x-2)
We simplify the equation to the form, which is simple to understand
90=-3(4x-2)
Reorder the terms in parentheses
90=+(-12x+6)
Remove unnecessary parentheses
+90=-12x+6
We move all terms containing x to the left and all other terms to the right.
+12x=+6-90
We simplify left and right side of the equation.
+12x=-84
We divide both sides of the equation by 012 to get x.
x=-7
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