Question

Find the number, if 2 1/2 of it is 15.

Answer 1

Answer:

let the number be x

according to question,

2½ of x = 15

$= > \frac{5}{2} \times x = 15 \\ = > 5x = 15 \times 2 \\ = > x = \frac{15 \times 2}{5} \\ = > x = 3 \times 2 \\ = > x = 6$

so, the number is 6.

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

SO, let the number be x

Therefore, = 2 1/2x = 15

= 5/2 x = 15

Now that we have simplified it, we can cross multiply

Hence, 2 will be multiplied with 15 and 5x with 1

So now the equation will look something like this,

5 x = 30

Here 5 is being multiplied with x and when we bring 5 to the other side of = then it goes in  the denominator.

So now it will look like this,

x = 30/5

Since both 5 and 30 can be divided by 5 we simplify it

Hence x =6 ( 6 times 5 is 30)

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