Setlhopha sa baithaopi se ikaeletse go dira thekiso ya dithoto tsa kgale. Batho ba le 10 ba ntshitse mabokose a le 5 mongwe le mongwe.  Ba na le mabokose a mangwe a le 10.  Ba kgona go tlatsa dithoto tse lekanang le mabokose a le 2 mo tafoleng e le nngwe.  Fa ba na le ditafole di le 15, go tlhokega ditafole di le kae gape? 

The combined age of Peter, Paul and Jean is 100 years old. Find the age of Peter knowing that Paul is 10 years older than John and that Peter’s age is equal to the sum of Paul and John's age.
Go na le mabokose a a ntshitsweng a le 10*5=<<10*5=50>>50
Ka jalo ba na le mabokose a otlhe a le 50+10=<<50+10=60>>60
Seno se raya gore ba tlhoka ditafole di le 60/2=<<60/2=30>>30
Ka jalo ba tlhoka ditafole di le 30-15=<<30-15=15>>15
#### 15 

Let x be the age of John. Paul’s age is x + 10
Peter’s age is x + (x + 10) = 2x + 10
We have (2x + 10) + (x + 1) + x = 100
Combining like terms, we get 4x + 20 = 100
Subtracting 20 from both sides and dividing by 4, we get x = 80/4 = 20 years old.
John is 20 years old, Paul is 20 + 10 = 30 years old, and Peter is 2 * 20 + 10 = 50 years old.
#### 50