Trigonometry Examples

$x - 3 y = 9$

Step 1

Subtract $x$ from both sides of the equation.

$- 3 y = 9 - x$

Step 2

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

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Step 2.1

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

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

Step 2.2

Simplify the left side.

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Step 2.2.1

Cancel the common factor of $- 3$ .

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Step 2.2.1.1

Cancel the common factor.

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

Step 2.2.1.2

Divide $y$ by $1$ .

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

Step 2.3

Simplify the right side.

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Step 2.3.1

Simplify each term.

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Step 2.3.1.1

Divide $9$ by $- 3$ .

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

Step 2.3.1.2

Dividing two negative values results in a positive value.

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