Question

If 20 is added to four times a certain
number, the result iss less than five
times the number, the number is​

Answer 1

Answer:

Let the number be x

Four times of the number 4x. On addition of 10 it will be 4x + 10

The result is five less then 5 times of the number, will be 5x - 5

4x + 10 = 5x - 5

4x - 5x = - 5 - 10

-x = - 15

x = 15

The number is 15

Answer the number is 15

Now checking the correctness of answer by putting the value of x in the equation

4x + 10 = 5x - 5

4 × 15 + 10 = 5 × 15 - 5

60 + 10 = 75 - 5

70 = 70

Means number 15 is correct

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