Pre-Algebra Examples

$- 3 = 2 x - y$

Step 1

Rewrite in slope-intercept form.

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Step 1.1

The slope-intercept form is $y = m x + b$ , where $m$ is the slope and $b$ is the y-intercept.

$y = m x + b$

Step 1.2

Rewrite the equation as $2 x - y = - 3$ .

$2 x - y = - 3$

Step 1.3

Subtract $2 x$ from both sides of the equation.

$- y = - 3 - 2 x$

Step 1.4

Divide each term in $- y = - 3 - 2 x$ by $- 1$ and simplify.

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Step 1.4.1

Divide each term in $- y = - 3 - 2 x$ by $- 1$ .

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

Step 1.4.2

Simplify the left side.

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Step 1.4.2.1

Dividing two negative values results in a positive value.

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

Step 1.4.2.2

Divide $y$ by $1$ .

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

Step 1.4.3

Simplify the right side.

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Step 1.4.3.1

Simplify each term.

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Step 1.4.3.1.1

Divide $- 3$ by $- 1$ .

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

Step 1.4.3.1.2

Move the negative one from the denominator of $\frac{- 2 x}{- 1}$ .

$y = 3 - 1 \cdot (- 2 x)$

Step 1.4.3.1.3

Rewrite $- 1 \cdot (- 2 x)$ as $- (- 2 x)$ .

$y = 3 - (- 2 x)$

Step 1.4.3.1.4

Multiply $- 2$ by $- 1$ .

$y = 3 + 2 x$

Step 1.5

Reorder $3$ and $2 x$ .

$y = 2 x + 3$

Step 2

Using the slope-intercept form, the slope is $2$ .

$m = 2$

Step 3