19.7=21.6+f

Solution for 19.7=21.6+f equation:

Simplifying
19.7 = 21.6 + f

Solving
19.7 = 21.6 + f

Solving for variable 'f'.

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

Add '-1f' to each side of the equation.
19.7 + -1f = 21.6 + f + -1f

Combine like terms: f + -1f = 0
19.7 + -1f = 21.6 + 0
19.7 + -1f = 21.6

Add '-19.7' to each side of the equation.
19.7 + -19.7 + -1f = 21.6 + -19.7

Combine like terms: 19.7 + -19.7 = 0.0
0.0 + -1f = 21.6 + -19.7
-1f = 21.6 + -19.7

Combine like terms: 21.6 + -19.7 = 1.9
-1f = 1.9

Divide each side by '-1'.
f = -1.9

Simplifying
f = -1.9