Question

a desk and a cupboard weigh 100kg. if the weight of cupboard 20kg more than that of the desk. find the weight of each the articles?​

Answer 1

let the weight of a desk be xkg

let the weigt of cupboard be y kg

by give conditions

x+y=100 .....1

y=20+x

-x+y=20.....2

add 1 and 2

x+y=100

-x+y=20

2y=120

y. =60

put y=60 in eq 1

x+60=100

x. =40

x=40 y=60