Question

The sum of two numbers is 55 and the difference is 25
. What are the numbers?

Answer 1

so let the 2 numbers be x and y.

"sum of 2 numbers is 55"
how will you make an equation in x and y using this info?

Answer 2

well x+y=55, difference is obviously subtraction so it would be something like
x+(y-25)=55?

Answer 3

the difference between x and y is just x-y

so x-y = 25

makes sense?

Answer 4

right, but it says the sum of the two.

Answer 5

`sum of two numbers is 55` -> x+y = 55
`he difference is 25` -> x-y = 25

you still have confusion?

Answer 6

ok i see

Answer 7

now add both the equations,
you will eliminate y and get x

Answer 8

40 and 15

Answer 9

good! :)