Answer:
z = 33/5 or 6.6
x = 5/2 or 2.5
Step-by-step explanation:
20 = 5z - 13
Add 13 to both sides.
5z = 33
Divide both sides by 5.
-9 + 2x = -4
Add 9 to both sides.
2x = 5
Divide both sides by 2.
