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3x+76-(2x-45)=31
We simplify the equation to the form, which is simple to understand
3x+76-(2x-45)=31
Remove unnecessary parentheses
3x+76-2x+45=31
We move all terms containing x to the left and all other terms to the right.
+3x-2x=+31-76-45
We simplify left and right side of the equation.
+1x=-90
We divide both sides of the equation by 1 to get x.
x=-90
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