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Jose is now twice as old as Lara. Five years ago he was three times as old as Lara. Find their present age.


Sagot :

let  x   be the age of Lara now
thus the age of Jose is    2x
five years ago age of Lara =  x-5
                       age of Jose =  2x-5
so the equation is
   2x-5 =  3(x-5)          /  3 times as old as Lara
   2x -5 = 3x -15
   x = 10
Lara present age =  10 years
Jose present age = 2x  = 2 . 10
                             =  20 years

Joel=2x
x=Lara

2x-5=3(x-5)
2x-5=3x-15
x=10

lara is 10 joel is 20