Pre-Algebra Examples

$a - 8 = - 21$

Step 1

Add $8$ to both sides of the equation.

$a = - 21 + 8$

Step 2

Add $- 21$ and $8$ .

$a = - 13$

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