Q21. - Algebra 1

Question

Solve each equation. Check your solution.

$18+z=40$

Step-by-Step Solution

Answer

The required solution is $z=22$.

Step 1. Write the given information.

The given equation is:

$18+z=40$

Step 2. Calculation.

Consider given equation

$\begin{array}{l} 18+z=40\\ 18+z-18=40-18\text{ [Subtract 18 from both sides]}\\ z=22\end{array}$

Step 3. Checking solution.

Substitute $z=22$ in the given equation to check:

$\begin{array}{l} 18+z=40\\ 18+22=40\\ 40=40\end{array}$

Hence, proved.