Question

Amina thinks of a number and subtracts 5 from it. She multiplies the result by 8. The result
now obtained is 3 times the same number she thought of. What is the number?
2​

Answer 1

Answer:

let that number be X

Operation 1= X-5

Operation 2=(X-5)8=8X-40

Now the results is 3 times the X so 3X

so 8X- 40= 3X

5X=40

X=8

The required number is 8

Answer 2

☯GIVEN :

• Amina thinks of a number and subtracts 5 from it. She multiplies the result by 8.

• The result now obtained is 3 times the same number.

☯TO FIND :

• Required number.

➲SOLUTION :

✞Let the required number be x.

• Amina thinks of a number and subtracts 5 from it. She multiplies the result by 8.

• The result now obtained is 3 times the same number.

$\implies \sf{(x - 5) \times 8 = 3 \times x}$

$\implies \sf{8x - 40 = 3 x}$

$\implies \sf{8x -3x= 40}$

$\implies \sf{5x= 40}$

$\implies \sf{x = \cancel{\dfrac{ 40}{5}}}$

$\implies{ \underline{ \huge{ \boxed{ \pink{ \bf{x = 8}}}}}}$

$\huge {\green {\therefore}}$ Required Number is 8.