5(9-f)=21

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Solution for 5(9-f)=21 equation:


Simplifying
5(9 + -1f) = 21
(9 * 5 + -1f * 5) = 21
(45 + -5f) = 21

Solving
45 + -5f = 21

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Add '-45' to each side of the equation.
45 + -45 + -5f = 21 + -45

Combine like terms: 45 + -45 = 0
0 + -5f = 21 + -45
-5f = 21 + -45

Combine like terms: 21 + -45 = -24
-5f = -24

Divide each side by '-5'.
f = 4.8

Simplifying
f = 4.8

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