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40=6x+2(-7x-4)
We simplify the equation to the form, which is simple to understand
40=6x+2(-7x-4)
Reorder the terms in parentheses
40=6x+(-14x-8)
Remove unnecessary parentheses
+40=+6x-14x-8
We move all terms containing x to the left and all other terms to the right.
-6x+14x=-8-40
We simplify left and right side of the equation.
+8x=-48
We divide both sides of the equation by 8 to get x.
x=-6
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