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4x+9=3(x+4)
We simplify the equation to the form, which is simple to understand
4x+9=3(x+4)
Reorder the terms in parentheses
4x+9=+(+3x+12)
Remove unnecessary parentheses
+4x+9=+3x+12
We move all terms containing x to the left and all other terms to the right.
+4x-3x=+12-9
We simplify left and right side of the equation.
+1x=+3
We divide both sides of the equation by 1 to get x.
x=3
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