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4x-5(-8)=20
We simplify the equation to the form, which is simple to understand
4x-5(-8)=20
Reorder the terms in parentheses
4x+(+40)=20
Remove unnecessary parentheses
+4x+40=+20
We move all terms containing x to the left and all other terms to the right.
+4x=+20-40
We simplify left and right side of the equation.
+4x=-20
We divide both sides of the equation by 4 to get x.
x=-5
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