Trigonometry Examples

$- x - 20 x + 3 = 0$

Step 1

Subtract $20 x$ from $- x$ .

$- 21 x + 3 = 0$

Step 2

Subtract $3$ from both sides of the equation.

$- 21 x = - 3$

Step 3

Divide each term in $- 21 x = - 3$ by $- 21$ and simplify.

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Step 3.1

Divide each term in $- 21 x = - 3$ by $- 21$ .

$\frac{- 21 x}{- 21} = \frac{- 3}{- 21}$

Step 3.2

Simplify the left side.

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Step 3.2.1

Cancel the common factor of $- 21$ .

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Step 3.2.1.1

Cancel the common factor.

$\frac{- 21 x}{- 21} = \frac{- 3}{- 21}$

Step 3.2.1.2

Divide $x$ by $1$ .

$x = \frac{- 3}{- 21}$

$x = \frac{- 3}{- 21}$

$x = \frac{- 3}{- 21}$

Step 3.3

Simplify the right side.

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Step 3.3.1

Cancel the common factor of $- 3$ and $- 21$ .

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Step 3.3.1.1

Factor $- 3$ out of $- 3$ .

$x = \frac{- 3 (1)}{- 21}$

Step 3.3.1.2

Cancel the common factors.

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Step 3.3.1.2.1

Factor $- 3$ out of $- 21$ .

$x = \frac{- 3 \cdot 1}{- 3 \cdot 7}$

Step 3.3.1.2.2

Cancel the common factor.

$x = \frac{- 3 \cdot 1}{- 3 \cdot 7}$

Step 3.3.1.2.3

Rewrite the expression.

$x = \frac{1}{7}$

$x = \frac{1}{7}$

$x = \frac{1}{7}$

$x = \frac{1}{7}$

$x = \frac{1}{7}$

Step 4

The result can be shown in multiple forms.

Exact Form:

$x = \frac{1}{7}$

Decimal Form:

$x = 0.\overline{142857}$

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