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12.5=2-3.5
We simplify the equation to the form, which is simple to understand
12.5=2-3.5
We move all terms containing to the left and all other terms to the right.
0=+2-3.5-12.5
We simplify left and right side of the equation.
0=-14
0=-14
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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