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3f+4f+18=11
We simplify the equation to the form, which is simple to understand
3f+4f+18=11
We move all terms containing f to the left and all other terms to the right.
+3f+4f=+11-18
We simplify left and right side of the equation.
+7f=-7
We divide both sides of the equation by 7 to get f.
f=-1
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