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f(-3)=-2(-3)+5
We simplify the equation to the form, which is simple to understand
f(-3)=-2(-3)+5
Reorder the terms in parentheses
+(-3f)=-2*(-3)+5
Remove unnecessary parentheses
-3f=-2+*(-3+)+5
Reorder the terms in parentheses
-3f=+(+6)+5
Remove unnecessary parentheses
-3f=+6+5
We move all terms containing f to the left and all other terms to the right.
-3f=+6+5
We simplify left and right side of the equation.
-3f=+11
We divide both sides of the equation by -3 to get f.
f=-3.66666666667
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