Algebra Examples

$9 x + 3 y = 3$

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

Subtract $9 x$ from both sides of the equation.

$3 y = 3 - 9 x$

Step 1.3

Divide each term in $3 y = 3 - 9 x$ by $3$ and simplify.

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Step 1.3.1

Divide each term in $3 y = 3 - 9 x$ by $3$ .

$\frac{3 y}{3} = \frac{3}{3} + \frac{- 9 x}{3}$

Step 1.3.2

Simplify the left side.

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Step 1.3.2.1

Cancel the common factor of $3$ .

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Step 1.3.2.1.1

Cancel the common factor.

$\frac{3 y}{3} = \frac{3}{3} + \frac{- 9 x}{3}$

Step 1.3.2.1.2

Divide $y$ by $1$ .

$y = \frac{3}{3} + \frac{- 9 x}{3}$

Step 1.3.3

Simplify the right side.

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Step 1.3.3.1

Simplify each term.

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Step 1.3.3.1.1

Divide $3$ by $3$ .

$y = 1 + \frac{- 9 x}{3}$

Step 1.3.3.1.2

Cancel the common factor of $- 9$ and $3$ .

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Step 1.3.3.1.2.1

Factor $3$ out of $- 9 x$ .

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

Step 1.3.3.1.2.2

Cancel the common factors.

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Step 1.3.3.1.2.2.1

Factor $3$ out of $3$ .

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

Step 1.3.3.1.2.2.2

Cancel the common factor.

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

Step 1.3.3.1.2.2.3

Rewrite the expression.

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

Step 1.3.3.1.2.2.4

Divide $- 3 x$ by $1$ .

$y = 1 - 3 x$

Step 1.4

Reorder $1$ and $- 3 x$ .

$y = - 3 x + 1$

Step 2

Use the slope-intercept form to find the slope and y-intercept.

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Step 2.1

Find the values of $m$ and $b$ using the form $y = m x + b$ .

$m = - 3$

$b = 1$

Step 2.2

The slope of the line is the value of $m$ , and the y-intercept is the value of $b$ .

Slope: $- 3$

y-intercept: $(0, 1)$

Slope: $- 3$

y-intercept: $(0, 1)$

Step 3