what is the sum of 40 and the difference of 10

Answer 1

two numbers that sum to 40 and have a difference of 10

can be described as

x + y = 40 and

x - y = 10. add the two equations

2x = 50

x =50/2 = 25

y =x-10=25-10 = 15

the numbers are 15 and 25. they sum to 40, and their difference = 10