3. Solve. Check Your Solutions
z - 12 = 30

z = 42

Step-by-step explanation:

z - 12 = 30

Add 12 to each side

z - 12+12 = 30+12

z = 42

Check

42 - 12 = 30

30 = 30

Step-by-step explanation:

If we want to solve this algebraic equation, we need to isolate z on one side.

Add 12 to both sides:

To check our work, let's substitute 42 in as .

42 minus 12 is indeed 30.

Hope this helped!

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right