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3f-12=3(f-1)
We simplify the equation to the form, which is simple to understand
3f-12=3(f-1)
Reorder the terms in parentheses
3f-12=+(+3f-3)
Remove unnecessary parentheses
+3f-12=+3f-3
We move all terms containing f to the left and all other terms to the right.
+3f-3f=-3+12
We simplify left and right side of the equation.
f=+9
0=9
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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