Question

the sum of two numbers is 40 and the difference is 10.find the bigger number.
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Answer 1

Answer:

We use this x value that we have an plug it into the other equation. Thus x - y = 10 is the same as (40 - y) - y = 10. This is equal to 40 - 2y = 10. We then move around the numbers in the equation to get 2y = 30.

Answer 2

Answer:

25

Step-by-step explanation:

let the numbers = x,y

given that

x+y = 40..(1)

x-y = 10..(2)

adding both the equations

2x = 50

x = 25

so,

y = 15

the bigger number is 25