Move all terms not containing f to the right side of the equation.
Subtract 8 from both sides of the equation.
Subtract 8 from -2.
Divide each term by 5 and simplify.
Divide each term in 5f=-10 by 5.
Cancel the common factor of 5.
Cancel the common factor.
Divide f by 1.
Divide -10 by 5.
Solve for f 8+5f=-2