Precalculus Examples

$\frac{x + 1}{x - 1} = \frac{3 x}{3 x - 6}$

Step 1

Cancel the common factor of $3$ and $3 x - 6$ .

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Step 1.1

Factor $3$ out of $3 x$ .

$\frac{x + 1}{x - 1} = \frac{3 (x)}{3 x - 6}$

Step 1.2

Cancel the common factors.

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Step 1.2.1

Factor $3$ out of $3 x$ .

$\frac{x + 1}{x - 1} = \frac{3 (x)}{3 (x) - 6}$

Step 1.2.2

Factor $3$ out of $- 6$ .

$\frac{x + 1}{x - 1} = \frac{3 (x)}{3 x + 3 \cdot - 2}$

Step 1.2.3

Factor $3$ out of $3 x + 3 \cdot - 2$ .

$\frac{x + 1}{x - 1} = \frac{3 (x)}{3 (x - 2)}$

Step 1.2.4

Cancel the common factor.

$\frac{x + 1}{x - 1} = \frac{3 x}{3 (x - 2)}$

Step 1.2.5

Rewrite the expression.

$\frac{x + 1}{x - 1} = \frac{x}{x - 2}$

Step 2

Multiply the numerator of the first fraction by the denominator of the second fraction. Set this equal to the product of the denominator of the first fraction and the numerator of the second fraction.

$(x + 1) (x - 2) = (x - 1) x$

Step 3

Solve the equation for $x$ .

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Step 3.1

Simplify $(x + 1) (x - 2)$ .

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Step 3.1.1

Rewrite.

$0 + 0 + (x + 1) (x - 2) = (x - 1) x$

Step 3.1.2

Simplify by adding zeros.

$(x + 1) (x - 2) = (x - 1) x$

Step 3.1.3

Expand $(x + 1) (x - 2)$ using the FOIL Method.

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Step 3.1.3.1

Apply the distributive property.

$x (x - 2) + 1 (x - 2) = (x - 1) x$

Step 3.1.3.2

Apply the distributive property.

$x \cdot x + x \cdot - 2 + 1 (x - 2) = (x - 1) x$

Step 3.1.3.3

Apply the distributive property.

$x \cdot x + x \cdot - 2 + 1 x + 1 \cdot - 2 = (x - 1) x$

Step 3.1.4

Simplify and combine like terms.

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Step 3.1.4.1

Simplify each term.

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Step 3.1.4.1.1

Multiply $x$ by $x$ .

$x^{2} + x \cdot - 2 + 1 x + 1 \cdot - 2 = (x - 1) x$

Step 3.1.4.1.2

Move $- 2$ to the left of $x$ .

$x^{2} - 2 \cdot x + 1 x + 1 \cdot - 2 = (x - 1) x$

Step 3.1.4.1.3

Multiply $x$ by $1$ .

$x^{2} - 2 x + x + 1 \cdot - 2 = (x - 1) x$

Step 3.1.4.1.4

Multiply $- 2$ by $1$ .

$x^{2} - 2 x + x - 2 = (x - 1) x$

Step 3.1.4.2

Add $- 2 x$ and $x$ .

$x^{2} - x - 2 = (x - 1) x$

Step 3.2

Simplify $(x - 1) x$ .

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Step 3.2.1

Apply the distributive property.

$x^{2} - x - 2 = x \cdot x - 1 x$

Step 3.2.2

Simplify the expression.

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Step 3.2.2.1

Multiply $x$ by $x$ .

$x^{2} - x - 2 = x^{2} - 1 x$

Step 3.2.2.2

Rewrite $- 1 x$ as $- x$ .

$x^{2} - x - 2 = x^{2} - x$

Step 3.3

Move all terms containing $x$ to the left side of the equation.

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Step 3.3.1

Subtract $x^{2}$ from both sides of the equation.

$x^{2} - x - 2 - x^{2} = - x$

Step 3.3.2

Add $x$ to both sides of the equation.

$x^{2} - x - 2 - x^{2} + x = 0$

Step 3.3.3

Combine the opposite terms in $x^{2} - x - 2 - x^{2} + x$ .

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Step 3.3.3.1

Subtract $x^{2}$ from $x^{2}$ .

$- x - 2 + 0 + x = 0$

Step 3.3.3.2

Add $- x - 2$ and $0$ .

$- x - 2 + x = 0$

Step 3.3.3.3

Add $- x$ and $x$ .

$0 - 2 = 0$

Step 3.3.3.4

Subtract $2$ from $0$ .

$- 2 = 0$

Step 3.4

Since $- 2 \neq 0$ , there are no solutions.

No solution