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-140=6x-7(6x-16)
We simplify the equation to the form, which is simple to understand
-140=6x-7(6x-16)
Reorder the terms in parentheses
-140=6x+(-42x+112)
Remove unnecessary parentheses
-140=+6x-42x+112
We move all terms containing x to the left and all other terms to the right.
-6x+42x=+112+140
We simplify left and right side of the equation.
+36x=+252
We divide both sides of the equation by 36 to get x.
x=7
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