f()=15-3

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Solution for f()=15-3 equation:


f()=15-3

We simplify the equation to the form, which is simple to understand 
f()=15-3

Reorder the terms in parentheses
+()=15-3

Remove unnecessary parentheses
=+15-3

We move all terms containing f to the left and all other terms to the right. 
0=+15-3

We simplify left and right side of the equation. 
0=+12

0=12

The left and right sides are not equal, therefore there is no solution. This equation is invalid.

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