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20=8+3(13+4x)
We simplify the equation to the form, which is simple to understand
20=8+3(13+4x)
Reorder the terms in parentheses
20=8+(+39+12x)
Remove unnecessary parentheses
+20=+8+39+12x
We move all terms containing x to the left and all other terms to the right.
-12x=+8+39-20
We simplify left and right side of the equation.
-12x=+27
We divide both sides of the equation by -012 to get x.
x=-2.25
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