Question

two numbers are in the ratio 4:9 if both numbers are increased by 12 the ratio become 11:12 find the original numbers​

Answer 1

Step-by-step explanation:

let the the 2 be 4x and 9x

4x +12 = 11

9x +12 12

by cross multiplication

48x +144 = 99x + 132

12 = 51x

x = 12/51

4x = 48/51 , 9x = 108/51

Answer 2

Answer:

18,72

Step-by-step explanation:

(4:9)×10. =8:18

(11:21)×5. =11:21

21-18=3-------12

1-------4

8×4=32

18×4=72