Question

Amina thinks of a number and subtracts 5/2 from it. and she multiply the result by 8 the result now obtained if three time the same number she thought of .what is the number ?​

Answer 1

Solution:

Let the number = x

According to the problem given,

(x-5/2)×8 = 3x

=> 8x - (5/2)×8 = 3x

=> 8x - 5×4 = 3x

=> 8x - 20 = 3x

=> 8x -3x = 20

=> 5x = 20

=> x = 20/5

=> x = 4

Therefore,

The required number = x = 4

•••••

Answer 2

suppose the number is x.

so according to data

first she subtract 5/2

so

x-5/2

now she multiply that value by 8

(x-5/2)*8

now the result is three times the same number she thought

(x-5/2)*8= 3x

(x-2.5)*8=3x

8x- 20= 3x

5x=20

X=4

so the answer is 4.