Answer:
69
Step-by-step explanation:
43 = 20 + z/3 - first, you need to subtract 20 from both sides
43 - 20 = z/3 → 23 = z/3 - then, multiply both sides by 3 to get z on its own
23 × 3 = z → z = 69
Hope this helps!
z = 7.6
43 = 20 + z/3
-z/3 = 20 - 43
-z = (20 - 43)/3
-z = -23/3
-z = -7.6
