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4f+3f+18=0
We simplify the equation to the form, which is simple to understand
4f+3f+18=0
We move all terms containing f to the left and all other terms to the right.
+4f+3f=0-18
We simplify left and right side of the equation.
+7f=-18
We divide both sides of the equation by 7 to get f.
f=-2.57142857143
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