Solve for f 9f+4-7f=8

$9 f + 4 - 7 f = 8$

Subtract $7 f$ from $9 f$ .

$2 f + 4 = 8$

Move all terms not containing $f$ to the right side of the equation.

Subtract $4$ from both sides of the equation.

$2 f = 8 - 4$

Subtract $4$ from $8$ .

$2 f = 4$

Divide each term in $2 f = 4$ by $2$ and simplify.

Divide each term in $2 f = 4$ by $2$ .

$\frac{2 f}{2} = \frac{4}{2}$

Simplify the left side.

Cancel the common factor of $2$ .

Cancel the common factor.

$\frac{2 f}{2} = \frac{4}{2}$

Divide $f$ by $1$ .

$f = \frac{4}{2}$

Simplify the right side.

Divide $4$ by $2$ .

$f = 2$