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x+(3x+3)=43
We simplify the equation to the form, which is simple to understand
x+(3x+3)=43
Remove unnecessary parentheses
+x+3x+3=+43
We move all terms containing x to the left and all other terms to the right.
+1x+3x=+43-3
We simplify left and right side of the equation.
+4x=+40
We divide both sides of the equation by 4 to get x.
x=10
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