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9(7-2)+4=31
We simplify the equation to the form, which is simple to understand
9(7-2)+4=31
Simplifying terms in parentheses
9*(+5)+4=31
Reorder the terms in parentheses
+(+45)+4=31
Remove unnecessary parentheses
+45+4=+31
We move all terms containing to the left and all other terms to the right.
0=+31-45-4
We simplify left and right side of the equation.
0=-18
0=-18
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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