Question

Bob weighs 15kgs heavier than Kerry who weighs twice as much as Sean. if the three weigh 125kgs altogether, how much does Sean weigh?

Answer 1

Explanation:

let Sean weight be x

then kerry's weight is twice as Sean that means 2x

and Bob weighs 15kg

three of them altogether weigh 125

that means 15 +2x + x = 125

15+ 3x= 125

we collect like terms

3x= 125-15

3x= 110

therefore x= 36.67kg