21-15f=219

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Solution for 21-15f=219 equation: 


Simplifying
21 + -15f = 219

Solving
21 + -15f = 219

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 + -15f = 219 + -21

Combine like terms: 21 + -21 = 0
0 + -15f = 219 + -21
-15f = 219 + -21

Combine like terms: 219 + -21 = 198
-15f = 198

Divide each side by '-15'.
f = -13.2

Simplifying
f = -13.2

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