Question

The sum of two numbers is 40 and their difference is 10

Answer 1

Answer:

50

Step-by-step explanation:

40+10

= 50

the sum is 50

Answer 2

Step-by-step explanation:

Assume the numbers are x, and y.

x+y=40. This would mean that x=40-y. The second condition is that x-y=10. Rewrite that to include what x is now known to be equal to, and you get 40–2y=10

40 -40 -2y=10 -40

-2y=-30

y=15

Now replace y in the first equation, and that becomes x+15=40.

x+15 -15 =40 -15

x=25

…and 25–15=10

The two numbers are 25 and 15.