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3(1+x)=15-4x
We simplify the equation to the form, which is simple to understand
3(1+x)=15-4x
Reorder the terms in parentheses
+(+3+3x)=15-4x
Remove unnecessary parentheses
+3+3x=+15-4x
We move all terms containing x to the left and all other terms to the right.
+3x+4x=+15-3
We simplify left and right side of the equation.
+7x=+12
We divide both sides of the equation by 7 to get x.
x=1.71428571429
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