Question 939393
stefan is 14 years old. his mother is 38
assume t years ago,age of mother exactly 5 times as of stefan
t yeas ago, stefan age  = 14-t
 t years ago, mother's age  = 38-t
38-t= 5*(14-t)
 38-t= 5*14-5*t
 38-t= 70 -5t
  add 5t on both sides
 38-t+5t  =70-5t+5t
  38+4t  =70
     move 38 to the right
     4t  =70- 38
   4t  = 32
 divide with  4 on both sides
 {{{ 4t/4  =32/4}}}
        t=8 tears
Result : t = 8 years