Question

Solve the proportion using mental math. x/4=10/20

Answer 1

x = 2
10/20 = 1/2
2/4 = 1/2

Answer 2

x/4 = 10/20

x(5)/4(5) = 10/20

5x/20 = 10/20

5x = 10

5x/5 = 10/5

x = 2

2 is your answer

hope this helps