Question

The sum of two numbers is 40. the smaller number is 20 less than the larger number. what are the numbers ?

Answer 1

you have to make an equation for this

Answer 2

Let small number = x large number = y

Answer 3

name the larger number x

Answer 4

and try to express the smaller number using the larger number (x)

Answer 5

x = smaller number
y = larger number

1) x+y = 40
2) x = y - 20 or x-y = -20

system of equations:

x + y = 40
x - y =-20

solving:

2x = 20 --> x = 10.

Answer 6

no you have to use one variable

Answer 7

So from first statement sum of them = x + y = 40

Answer 8

replacing in 1) 10 + y = 40 --> y = 30

Answer 9

x:large number

Answer 10

\[x=10,y =30\] am i right gusy, I'm just checking

Answer 11

hey please someone. is my work right ?

Answer 12

yes

Answer 13

Absolutely right x =10 y = 30

Answer 14

but you could solve it with the following way to:
let x:large number and x-20:small number so:
x-20+x=40 solve it for x ....

Answer 15

Ok thanks to both of you !

Answer 16

i know both diserve the medal

Answer 17

so the fair thing to do would be medals for everyone