help me guys to answer this i really really need the answer please answer this guys nonsense will bereport

Answer:
1. 30
2. 20
Step-by-step explanation:
1. a + b = 90
60+ b = 90
b = 90-60
b = 30
2. a+ b = 90
70+b = 90
b= 90- 70
b= 20