Question 1156131
let e = Eric's present age
let k = K's present age
Write an equation for each statement
:
Mr.Karikari is five times as old as Eric.
k = 5e
In ten years time Mr Karikari will be thrice as old as Eric.
k + 10 = 3(e+10)
distribute the 3
k + 10 = 3e + 30
k = 3e + 30 - 10
k = 3e + 20
replace k with 5e, from the 1st statement
5e = 3e + 20
5e - 3e + 20
2e = 20
e = 20/2
e = 10 yrs is Eric's age
then
5(10) = 50 yrs is K's age
:
:
Confirm solutions in the statement
"In ten years time Mr Karikari will be thrice as old as Eric"
50 + 10 = 3(10+10)