Basic Math Examples

$\frac{x - 1}{5 x - 6}$

Step 1

Set the denominator in $\frac{x - 1}{5 x - 6}$ equal to $0$ to find where the expression is undefined.

$5 x - 6 = 0$

Step 2

Solve for $x$ .

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Step 2.1

Add $6$ to both sides of the equation.

$5 x = 6$

Step 2.2

Divide each term in $5 x = 6$ by $5$ and simplify.

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Step 2.2.1

Divide each term in $5 x = 6$ by $5$ .

$\frac{5 x}{5} = \frac{6}{5}$

Step 2.2.2

Simplify the left side.

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Step 2.2.2.1

Cancel the common factor of $5$ .

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Step 2.2.2.1.1

Cancel the common factor.

$\frac{5 x}{5} = \frac{6}{5}$

Step 2.2.2.1.2

Divide $x$ by $1$ .

$x = \frac{6}{5}$

Step 3

The domain is all values of $x$ that make the expression defined.

Interval Notation:

$(- \infty, \frac{6}{5}) \cup (\frac{6}{5}, \infty)$

Set-Builder Notation:

${x | x \neq \frac{6}{5}}$

Step 4