Algebra Examples

$\frac{6}{x + 6} + \frac{5}{x - 3}$

To write $\frac{6}{x + 6}$ as a fraction with a common denominator, multiply by $\frac{x - 3}{x - 3}$ .

$\frac{6}{x + 6} \frac{x - 3}{x - 3} + \frac{5}{x - 3}$

To write $\frac{5}{x - 3}$ as a fraction with a common denominator, multiply by $\frac{x + 6}{x + 6}$ .

$\frac{6}{x + 6} \frac{x - 3}{x - 3} + \frac{5}{x - 3} \frac{x + 6}{x + 6}$

Write each expression with a common denominator of $(x + 6) (x - 3)$ , by multiplying each by an appropriate factor of $1$ .

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Combine.

$\frac{6 (x - 3)}{(x + 6) (x - 3)} + \frac{5}{x - 3} \frac{x + 6}{x + 6}$

Combine.

$\frac{6 (x - 3)}{(x + 6) (x - 3)} + \frac{5 (x + 6)}{(x - 3) (x + 6)}$

Reorder terms.

$\frac{6 (x - 3)}{(x + 6) (x - 3)} + \frac{5 (x + 6)}{(x + 6) (x - 3)}$

Combine the numerators over the common denominator.

$\frac{6 (x - 3) + 5 (x + 6)}{(x + 6) (x - 3)}$

Simplify the numerator.

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Apply the distributive property.

$\frac{6 x + 6 \cdot - 3 + 5 (x + 6)}{(x + 6) (x - 3)}$

Multiply $6$ by $- 3$ .

$\frac{6 x - 18 + 5 (x + 6)}{(x + 6) (x - 3)}$

Apply the distributive property.

$\frac{6 x - 18 + (5 x + 5 \cdot 6)}{(x + 6) (x - 3)}$

Multiply $5$ by $6$ .

$\frac{6 x - 18 + (5 x + 30)}{(x + 6) (x - 3)}$

Remove parentheses.

$\frac{6 x - 18 + 5 x + 30}{(x + 6) (x - 3)}$

Add $6 x$ and $5 x$ .

$\frac{11 x - 18 + 30}{(x + 6) (x - 3)}$

Add $- 18$ and $30$ .

$\frac{11 x + 12}{(x + 6) (x - 3)}$

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