Question

please please solve all the above questions​

Answer 1

Answer:

this is only for no. 12, though

Step-by-step explanation:

x - ritu's age

y- raju's age

present

x= 4y

after 4 yrs..

x (ritu's age) + 4(yrs) = 2 (y [raju's age] +4yrs)

x + 4 = 2(y+4)

x +4= 2y+8

x-2y= 4

substitute x of the present age equation to the after 4 yrs equation

4y-2y= 4

2y=4

y= 4/2

y=2 years

use the present age formula

x=4y

x= 4(2)

x= 8

therefore, their present age is ; ritu= 8 years old and Raju = 2 years old