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7-8x=x-4(2+x)
We simplify the equation to the form, which is simple to understand
7-8x=x-4(2+x)
Reorder the terms in parentheses
7-8x=x+(-8-4x)
Remove unnecessary parentheses
+7-8x=+x-8-4x
We move all terms containing x to the left and all other terms to the right.
-8x-1x+4x=-8-7
We simplify left and right side of the equation.
-5x=-15
We divide both sides of the equation by -5 to get x.
x=3
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