The difference of 9/10 of a number and 30 is the same as 3/5 of the number. find the number.

The number is 100.

Step-by-step explanation:

In order to find the number that is hidden in the given problem, there are a series of equivalencies that have to be made to create an equation to solve the problem.

9/10 = 0.9

3/5 = 6/10 = 0.6

So, this equivalencies established, we are going to perform the following calculation to find the number, by using an equation:

0.9X - 30 = 0.6X

0.9X = 0.6 X + 30

0.9X - 0.6X = 30

0.3X = 30

X = 30 / 0.3

X = 100

According to this calculation, the number is 100.

in if you ask questions, the points are taken from your total and given to the one who answered it..

so if i have 30 points and i ask a question for 5 points, then when someone asks a question i will lose 5 points and the answerer earns 5

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