Pre-Algebra Examples

$(20 m n + 5 n) + (7 m n - 2 n + 3 n)$

Step 1

Remove parentheses.

$20 m n + 5 n + 7 m n - 2 n + 3 n$

Step 2

Add $20 m n$ and $7 m n$ .

$27 m n + 5 n - 2 n + 3 n$

Step 3

Subtract $2 n$ from $5 n$ .

$27 m n + 3 n + 3 n$

Step 4

Add $3 n$ and $3 n$ .

$27 m n + 6 n$

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