Question

The sum of two numbers is 17 and their dofference is 7. What are the two numbers?

Answer 1

12 and 5 the two numbers

x+y=17 add 17 and 7

x-y=7

2x=24 and you get 24

x=24/2 divided by 2 is 12

x=12

12+5=17

12-5=7

Answer 2

The two number are 15 and 5

Explanation:

Let both numbers be first and second.

According to the problem statement:

first + second = 20 (Consider this as 1st equation)

first – second = 10 (Consider this as 2nd equation)

Add both equations:

first + second + first – second = 20 + 10

2 * first = 30

first = 30 / 2

first = 15

So from this we get first = 15, put this value in any equation i.e.

first + second = 20 (Put the value of first in this equation)

15 + second = 20

second = 20 – 15

second = 5

So, the numbers are 15 and 5.