Question

The sum of three numbers is 15. If the second number is subtracted from the sum of first and third number then we get 5. When the third number is subtracted from the sum of twice the first number and the second number we get 4. Find the three numbers.

Answer 1

3 , 5 , 7

Step-by-step explanation:

Let say three numbers are

a , b , c

a + b + c = 15 eq 1

a + c - b = 5 eq 2

2a + b - c = 4 Eq 3

Eq 1 - eq 2

=> 2b = 10

=> b = 5

Eq 2 + eq 3

3a = 9

=> a = 3

putting un eq 1 a & b values

3 + 5 + c = 15

=> c = 7

3 , 5 , 7