Question

Find the number which when multiplied by 5 is increased by 80.

Answer 1

Let the number be x
If the number is multiplied by 5 it is increased by 80
5x=x+80
5x-x=80
4x=80
x=20
Therefore the number is 20

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Answer 2

Let the number be x

when the number is multiplied by 5, it is increased by 80

therefore as per the condition, we get that

5x = x + 80

5x - x = 80

4x = 80

x= 80/4

x = 20

Therefore the number which when multiplied by 5 is increased by 80 is 20.