Pre-Algebra Examples

3 x = - 12

$3 x = - 12$

Step 1

Divide each term in

$3 x = - 12$ by

$3$ and simplify.

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Step 1.1

Divide each term in

$3 x = - 12$ by

$3$ .

$\frac{3 x}{3} = \frac{- 12}{3}$

Step 1.2

Simplify the left side.

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Step 1.2.1

Cancel the common factor of

$3$ .

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Step 1.2.1.1

Cancel the common factor.

$\frac{3 x}{3} = \frac{- 12}{3}$

Step 1.2.1.2

Divide

$x$ by

$1$ .

$x = \frac{- 12}{3}$

Step 1.3

Simplify the right side.

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Step 1.3.1

Divide

$- 12$ by

$3$ .

$x = - 4$

Step 2

Since

$x = - 4$ is a vertical line, there is no y-intercept and the slope is undefined.

Slope: Undefined

y-intercept: No y-intercept

Step 3

Find two points on the line.

$\begin{array}{c} x & y \\ - 4 & 0 \\ - 4 & 1 \end{array}$

Step 4

Graph the line using the slope, y-intercept, and two points.

Slope: Undefined

y-intercept: No y-intercept

$\begin{array}{c} x & y \\ - 4 & 0 \\ - 4 & 1 \end{array}$

Step 5

$3 x = - 12$

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