Question

the sum of two number is 100. their deference is 40. find the number
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Answer 1

Answer:

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Let the number be x and y

hence,

x+y=100..............(1)

x-y=40...............(2)

Subtract equation (2) from (1)

We get,

2y=60

y=30

Substitute value of y in equation (1)

So

x+30=100

x=70

Answer 2

Answer:

70+30=100

70-30=40

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