Basic Math Examples

$13 r - (- 2 r) + 45 - (- 21 - 7 r)$

Step 1

Simplify each term.

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Step 1.1

Multiply $- 2$ by $- 1$ .

$13 r + 2 r + 45 - (- 21 - 7 r)$

Step 1.2

Apply the distributive property.

$13 r + 2 r + 45 - - 21 - (- 7 r)$

Step 1.3

Multiply $- 1$ by $- 21$ .

$13 r + 2 r + 45 + 21 - (- 7 r)$

Step 1.4

Multiply $- 7$ by $- 1$ .

$13 r + 2 r + 45 + 21 + 7 r$

$13 r + 2 r + 45 + 21 + 7 r$

Step 2

Simplify by adding terms.

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Step 2.1

Add $13 r$ and $2 r$ .

$15 r + 45 + 21 + 7 r$

Step 2.2

Add $15 r$ and $7 r$ .

$22 r + 45 + 21$

Step 2.3

Add $45$ and $21$ .

$22 r + 66$

$22 r + 66$

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