Question

21:x=y:25=9:15
find x, you value​

Answer 1

Explanation:

According to the question,

21/x = y/25 = 9/15

9/15 = 3/5

So, 21/x = 3/5

21/35 = 3/5

Therefore, x = 35

Answer 2

We have:

21 : x = y : 25 = 9 : 15

We have to find, the value of x is:

Solution:

∴ 21 : x = y : 25 = 9 : 15

⇒ 21 : x =  9 : 15 or, y : 25 = 9 : 15

∴ 21 : x = 9 : 15

⇒ $\dfrac{21}{x} =\dfrac{9}{15}$

By cross-multiplication, we get

⇒ 9 × x = 21 × 15

⇒ 9x = 315

Dividing both sides by 9, we get

$\dfrac{9x}{9}$ = $\dfrac{315}{9}$

⇒ x = 35

∴ x = 35

Thus, the value of "x is equal to 35".