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4x+3(4x+3)=20
We simplify the equation to the form, which is simple to understand
4x+3(4x+3)=20
Reorder the terms in parentheses
4x+(+12x+9)=20
Remove unnecessary parentheses
+4x+12x+9=+20
We move all terms containing x to the left and all other terms to the right.
+4x+12x=+20-9
We simplify left and right side of the equation.
+16x=+11
We divide both sides of the equation by 16 to get x.
x=0.6875
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