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-2(7-9f)=-28
We simplify the equation to the form, which is simple to understand
-2(7-9f)=-28
Reorder the terms in parentheses
+(-14+18f)=-28
Remove unnecessary parentheses
-14+18f=-28
We move all terms containing f to the left and all other terms to the right.
+18f=-28+14
We simplify left and right side of the equation.
+18f=-14
We divide both sides of the equation by 18 to get f.
f=-0.77777777777778
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