Question

amina think of a number and subtract 5/2 from it. she multiply the result by 8.the result now obtained is 3 times the same number she thought of. what is the number?​

Answer 1

Answer:

4

Step-by-step explanation:

Let Amina think a number x.

According to the question, 8\left(x-\frac{5}{2}\right)=3x8(x−  

2

5

​  

)=3x

\Rightarrow\ 8x-\frac{8\times5}{2}=3x⇒ 8x−  

2

8×5

​  

=3x

\Rightarrow\ 8x-4\times5=3x⇒ 8x−4×5=3x

\Rightarrow8x-20=3x⇒8x−20=3x

\Rightarrow8x-3x=20⇒8x−3x=20

\Rightarrow5x=20⇒5x=20

\Rightarrow x=\frac{20}{5}=4⇒x=  

5

20

​  

=4

Hence, the number is 4.

Answer 2

Answer:

let the number be x

so equation formed = x-5/2×8=3

3x= 5×4

3x=20

x= 20/3

x=4

hence the no. is 4