Pre-Algebra Examples

$(3 a + 7) + (a - 1)$

Step 1

Remove parentheses.

$3 a + 7 + a - 1$

Step 2

Add $3 a$ and $a$ .

$4 a + 7 - 1$

Step 3

Subtract $1$ from $7$ .

$4 a + 6$

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