can anyone please answer these??

Question

1. 2:x and 12:8
A.3
B.4
C.6

2. 5:15 and x:3
A.5
B.3
C.1

3. x:4 and 45:20
A.8
B.9
C.10

4. 21 to x and 7 to 10
A.24
B.30
C.40

5. x to 50 and 16 to 25
A.32
B.34
C.41

Answer 1

1. 2:x and 12:8
A.3
B.4
C.6
TYPO

2. 5:15 and x:3
A.5
B.3
C.1 <-----------------

3. x:4 and 45:20
A.8
B.9
C.10
4*45 = 20*x
x = 4*5*9/4*5
x = 9

4. 21 to x and 7 to 10
A.24
B.30
C.40
21/x =7/10
7 x = 3*7 *10
x = 30

5. x to 50 and 16 to 25
A.32
B.34
C.41
x/50 = 16/25
25 x = 2 * 25*16
x = 32

Answer 2

answer to 1??

Answer 3

1 is a typing error I believ