Question

Solve for the 12th one

Answer 1

Explanation:

s:m = 7:5

s = 7x, m = 5x

(7x+10):(5x+10) = 9:7

(7x+10)/(5x+10) = 9/7

7(7x+10) = 9(5x+10)

49x+70 = 45x+90

x = 5

s = 7x = 35, m = 5x = 25

Sonu is 35, Monu is 25