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If the difference between the ages of two persons is 8. 15 years ago the age of the elder one was twice the age of the younger one. find their present ages ( with steps please)

sudarsan R , 6 Years ago
Grade 9
anser 4 Answers
Arun

Last Activity: 6 Years ago

Dear student
 
Let the age = x and y where x>y
 
Now
x -y = 8
 
x -15 = 3(y -15)
x -15 = 3y - 45
x -3y = -30
 
Now solve the equations
2y = 38
Hence y = 19 years and x = 27 years

sudarsan R

Last Activity: 6 Years ago

Let the eldder age be x and younger age be y.X-y=8.........…........................./(1)X-15=2y-30,.....................................(2)X=41Y=23

Arun

Last Activity: 6 Years ago

Sorry I got wrong. Actually I read tgrice in stead of twice by mistake. Sorry. Hope you understand. Regards....arun

nitya prakash gupta

Last Activity: 6 Years ago

Let,
Firstperson age=x years,2nd person age=y years
And x>y,
ATQ:-
x-y=8
So x=8+y______(1)
Also,
x-15=2(y-15)_____(2)
Put x=8+y in (2),then,we have,
y+8-15=2y-30
=> y-7=2y-30
=>y=23
Now,x=8+y=31
 
So 1st person age=31years
      2nd person age=23 years
 

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