21.5=7f+4

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Solution for 21.5=7f+4 equation: 


Simplifying
21.5 = 7f + 4

Reorder the terms:
21.5 = 4 + 7f

Solving
21.5 = 4 + 7f

Solving for variable 'f'.

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

Add '-7f' to each side of the equation.
21.5 + -7f = 4 + 7f + -7f

Combine like terms: 7f + -7f = 0
21.5 + -7f = 4 + 0
21.5 + -7f = 4

Add '-21.5' to each side of the equation.
21.5 + -21.5 + -7f = 4 + -21.5

Combine like terms: 21.5 + -21.5 = 0.0
0.0 + -7f = 4 + -21.5
-7f = 4 + -21.5

Combine like terms: 4 + -21.5 = -17.5
-7f = -17.5

Divide each side by '-7'.
f = 2.5

Simplifying
f = 2.5

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