Pre-Algebra Examples

$(2 x - 9 y) + (4 x + 7 b)$

Step 1

Remove parentheses.

$2 x - 9 y + 4 x + 7 b$

Step 2

Add $2 x$ and $4 x$ .

$6 x - 9 y + 7 b$

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