Pre-Algebra Examples

$7 (- 13) \div (4 (- 7) - 3 \cdot - 9)$

Step 1

Rewrite the division as a fraction.

$\frac{7 (- 13)}{4 (- 7) - 3 \cdot - 9}$

Step 2

Multiply $7$ by $- 13$ .

$\frac{- 91}{4 (- 7) - 3 \cdot - 9}$

Step 3

Simplify the denominator.

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Step 3.1

Multiply $4$ by $- 7$ .

$\frac{- 91}{- 28 - 3 \cdot - 9}$

Step 3.2

Multiply $- 3$ by $- 9$ .

$\frac{- 91}{- 28 + 27}$

Step 3.3

Add $- 28$ and $27$ .

$\frac{- 91}{- 1}$

$\frac{- 91}{- 1}$

Step 4

Divide $- 91$ by $- 1$ .

$91$

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