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117/3-3*13+4*7=0
We simplify the equation to the form, which is simple to understand
117/3-3*13+4*7=0
Simplifying:
117/3-39+4*7=0
Simplifying:
117/3-39+28=0
Simplifying:
+39-39+28=0
We move all terms containing to the left and all other terms to the right.
0=0-39+39-28
We simplify left and right side of the equation.
0=-28
0=-28
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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