The difference between two numbers is 10 and their sum is 20. Find the biggest number.

1 answer:

8 0

Answer:

Step-by-step explanation:

x - y = 10, then x = 10 + y

x + y = 20

substitute for x:

10 + y + y = 20

2y = 10

y = 5

x = 10 + 5 = 15

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