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f(-7)=7(5)
We simplify the equation to the form, which is simple to understand
f(-7)=7(5)
Reorder the terms in parentheses
+(-7f)=7*(5)
Remove unnecessary parentheses
-7f=+7+*(+5+)
Reorder the terms in parentheses
-7f=+(+35)
Remove unnecessary parentheses
-7f=+35
We move all terms containing f to the left and all other terms to the right.
-7f=+35
We simplify left and right side of the equation.
-7f=+35
We divide both sides of the equation by -7 to get f.
f=-5
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