1.

Rihana's age is 3 years more than double the age of Koina. Three years ago, Rihana was 3 times old as Koina then. Find their percentage ages.

Answer»

Step-by-step explanation:

let the AGE of koina be x

rihanas age is 3 years more then DOUBLE the age of koina= 2x + 3

second condition,

3 years ago joins age was = x-3

and rihanas was 3 times old as kohina= 3( x-3)

I.e. => 3 (x-3) = x-3

3x - 9 = x-3

2x= 6

x= 3

so joins age is 3

subs. x = 3 in first equation

2x + 3

2 X 3 + 3

6+ 3

9

so rihanas age is 9

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