Algebra Examples

3 x + 4 y = 8

$3 x + 4 y = 8$

Step 1

Rewrite in slope-intercept form.

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Step 1.1

The slope-intercept form is

y = m x + b

$y = m x + b$ , where

m

$m$ is the slope and

b

$b$ is the y-intercept.

y = m x + b

$y = m x + b$

Step 1.2

Subtract

3 x

$3 x$ from both sides of the equation.

4 y = 8 - 3 x

$4 y = 8 - 3 x$

Step 1.3

Divide each term in

4 y = 8 - 3 x

$4 y = 8 - 3 x$ by

4

$4$ and simplify.

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Step 1.3.1

Divide each term in

4 y = 8 - 3 x

$4 y = 8 - 3 x$ by

4

$4$ .

\frac{4 y}{4} = \frac{8}{4} + \frac{- 3 x}{4}

$\frac{4 y}{4} = \frac{8}{4} + \frac{- 3 x}{4}$

Step 1.3.2

Simplify the left side.

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Step 1.3.2.1

Cancel the common factor of

4

$4$ .

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Step 1.3.2.1.1

Cancel the common factor.

\frac{4 y}{4} = \frac{8}{4} + \frac{- 3 x}{4}

$\frac{4 y}{4} = \frac{8}{4} + \frac{- 3 x}{4}$

Step 1.3.2.1.2

Divide

y

$y$ by

1

$1$ .

y = \frac{8}{4} + \frac{- 3 x}{4}

$y = \frac{8}{4} + \frac{- 3 x}{4}$

y = \frac{8}{4} + \frac{- 3 x}{4}

$y = \frac{8}{4} + \frac{- 3 x}{4}$

y = \frac{8}{4} + \frac{- 3 x}{4}

$y = \frac{8}{4} + \frac{- 3 x}{4}$

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

8

$8$ by

4

$4$ .

y = 2 + \frac{- 3 x}{4}

$y = 2 + \frac{- 3 x}{4}$

Step 1.3.3.1.2

Move the negative in front of the fraction.

y = 2 - \frac{3 x}{4}

$y = 2 - \frac{3 x}{4}$

y = 2 - \frac{3 x}{4}

$y = 2 - \frac{3 x}{4}$

y = 2 - \frac{3 x}{4}

$y = 2 - \frac{3 x}{4}$

y = 2 - \frac{3 x}{4}

$y = 2 - \frac{3 x}{4}$

Step 1.4

Write in

y = m x + b

$y = m x + b$ form.

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Step 1.4.1

Reorder

2

$2$ and

- \frac{3 x}{4}

$- \frac{3 x}{4}$ .

y = - \frac{3 x}{4} + 2

$y = - \frac{3 x}{4} + 2$

Step 1.4.2

Reorder terms.

y = - (\frac{3}{4} x) + 2

$y = - (\frac{3}{4} x) + 2$

Step 1.4.3

Remove parentheses.

y = - \frac{3}{4} x + 2

$y = - \frac{3}{4} x + 2$

y = - \frac{3}{4} x + 2

$y = - \frac{3}{4} x + 2$

y = - \frac{3}{4} x + 2

$y = - \frac{3}{4} x + 2$

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

$m$ and

b

$b$ using the form

y = m x + b

$y = m x + b$ .

m = - \frac{3}{4}

$m = - \frac{3}{4}$

b = 2

$b = 2$

Step 2.2

The slope of the line is the value of

m

$m$ , and the y-intercept is the value of

b

$b$ .

Slope:

- \frac{3}{4}

$- \frac{3}{4}$

y-intercept:

(0, 2)

$(0, 2)$

Slope:

- \frac{3}{4}

$- \frac{3}{4}$

y-intercept:

(0, 2)

$(0, 2)$

Step 3

3 x + 4 y = 8

$3 x + 4 y = 8$

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[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$