Question

In a rectangle one side is X + y one side is x minus y side is 21 CM one side is 17 cm so find the values of X and y

Answer 1

let x+y side be the bigger side

then x+y=21

=>x=21-y.....1

also x-y=17....2

put 1 in 2

21-2y=17

2y=4

y=2

x=21-y

=>x=21-2=19