Basic Math Examples

$\frac{9}{a + 9} - \frac{3 a}{a + 9} + \frac{4 a}{a + 9}$

Step 1

Combine the numerators over the common denominator.

$\frac{9 - 3 a + 4 a}{a + 9}$

Step 2

Add $- 3 a$ and $4 a$ .

$\frac{9 + a}{a + 9}$

Step 3

Cancel the common factor of $9 + a$ and $a + 9$ .

Tap for more steps...

Step 3.1

Reorder terms.

$\frac{a + 9}{a + 9}$

Step 3.2

Cancel the common factor.

$\frac{a + 9}{a + 9}$

Step 3.3

Rewrite the expression.

$1$