Answer:
C.
Step-by-step explanation:

Answer: 90 and 110
Step-by-step explanation:
Answer:
1013500000
Step-by-step explanation:
Addition, mate.
Answer:
See below
Step-by-step explanation:
1) x=2-1
x=1
2) (x+1)(x+1)=2(x+1)
3) 10x-20 -11 = 4+3x
10x-3x=20+11+4
7x=35
x=5