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1/2 + 4 = 12
We simplify the equation to the form, which is simple to understand
1/2+4=12
We move all terms containing to the left and all other terms to the right.
0=+12-0.5-4
We simplify left and right side of the equation.
0=+7.5
0=7.5
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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