3(5-f)=21-3f

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Solution for 3(5-f)=21-3f equation: 


Simplifying
3(5 + -1f) = 21 + -3f
(5 * 3 + -1f * 3) = 21 + -3f
(15 + -3f) = 21 + -3f

Add '3f' to each side of the equation.
15 + -3f + 3f = 21 + -3f + 3f

Combine like terms: -3f + 3f = 0
15 + 0 = 21 + -3f + 3f
15 = 21 + -3f + 3f

Combine like terms: -3f + 3f = 0
15 = 21 + 0
15 = 21

Solving
15 = 21

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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