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4*15/2+9=2*15/2-6
We simplify the equation to the form, which is simple to understand
4*15/2+9=2*15/2-6
We move all terms containing to the left and all other terms to the right.
0=+15-6-30-9
We simplify left and right side of the equation.
0=-30
0=-30
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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