7(f-3)=21

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Solution for 7(f-3)=21 equation: 


Simplifying
7(f + -3) = 21

Reorder the terms:
7(-3 + f) = 21
(-3 * 7 + f * 7) = 21
(-21 + 7f) = 21

Solving
-21 + 7f = 21

Solving for variable 'f'.

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

Add '21' to each side of the equation.
-21 + 21 + 7f = 21 + 21

Combine like terms: -21 + 21 = 0
0 + 7f = 21 + 21
7f = 21 + 21

Combine like terms: 21 + 21 = 42
7f = 42

Divide each side by '7'.
f = 6

Simplifying
f = 6

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