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687*2-100+80/2=0
We simplify the equation to the form, which is simple to understand
687*2-100+80/2=0
Simplifying:
+1374-100+80/2=0
Simplifying:
+1374-100+40=0
We move all terms containing to the left and all other terms to the right.
0=0-1374+100-40
We simplify left and right side of the equation.
0=-1314
0=-1314
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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