18=.4f

Solution for 18=.4f equation:

Simplifying
18 = 0.4f

Solving
18 = 0.4f

Solving for variable 'f'.

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

Add '-0.4f' to each side of the equation.
18 + -0.4f = 0.4f + -0.4f

Combine like terms: 0.4f + -0.4f = 0.0
18 + -0.4f = 0.0

Add '-18' to each side of the equation.
18 + -18 + -0.4f = 0.0 + -18

Combine like terms: 18 + -18 = 0
0 + -0.4f = 0.0 + -18
-0.4f = 0.0 + -18

Combine like terms: 0.0 + -18 = -18
-0.4f = -18

Divide each side by '-0.4'.
f = 45

Simplifying
f = 45