Identify the value of x that makes each pair of rations equivalent.

Question

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

6) 6 to 8 and 18 to x
A)20
B)22
C)24

7) 9÷36 and x÷4
A)1
B)4
C)9

8) 42÷22 and 21÷x
A)12
B)11
C)10

9) x÷7 and 5÷1
A)25
B)30
C)35

10)20÷x and 4÷8
A)35
B)40
C)48

Answer 1

I'll do the first one for you.
21 to x and 7 to 10
21/x = 7/10
Cross multiply and solve for x
7x = 210
x = 30

Use this same method for the rest of the problems.