Question

10) If 10 is added to four times a certain number, the result is 5 less than five times the number. The number is
a)15
b)20
c)25
d)35​

Answer 1

Answer:

15 is the correct ans

Step-by-step explanation:

As the question says ,

15 to four times so, 15*4 = 60

10 added to it so , 60+10 = 70

the question says that the number is 5 less than 5 times a certain number

5 times a certain number is 15*5 = 75

70 is 5 less than 75

hence , it is the correct ans

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Answer 2

Answer:

Option a) 15

The number is 15

Step-by-step explanation:

Given:

A number when multiplied by 4 and added by 10 results to the same number multiplied by 5 and 5 subtracted.

To find :

The number

Solution :

Let,

The number = x

According to the Question :

If 10 is added to four times a certain number

The number = x

Four times a certain number = 4x

If 10 is added to four times a certain number = 4x + 10

The result is 5 less than five times the number = 5x - 5

Equation formed → 4x + 10 = 5x - 5

The number = ??

$\longrightarrow$ 4x + 10 = 5x - 5

$\longrightarrow$ 4x = 5x - 5 - 10

$\longrightarrow$ 4x = 5x - 15

$\longrightarrow$ 4x - 5x = - 15

$\longrightarrow$ - 1x = - 15

$\longrightarrow$ x = 15

Therefore, The number is 15