Grade 910 grade maths

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

8 Years agoGrade 9

4 Answers

Arun

8 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

8 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

Approved Tutor Answer8 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

8 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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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

4 Answers

Arun

sudarsan R

Arun

nitya prakash gupta

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