f-15=6

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Solution for f-15=6 equation:


f-15=6

We simplify the equation to the form, which is simple to understand 
f-15=6

We move all terms containing f to the left and all other terms to the right. 
+1f=+6+15

We simplify left and right side of the equation. 
+1f=+21

We divide both sides of the equation by 1 to get f. 
f=21

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