Question

If x:y =3:4 then (7x+3y):(7x-3y) is equal to​

Answer 1

Solution

x:y=3:4

$\frac{x}{y} = \frac{3}{4} \\ = > \frac{x}{3} = \frac{y}{4} = k(let) \\ = > \frac{x}{3} = k \: \: \:, \: \: \: \frac{y}{4} = k \\ = > x = 3k \: \: \: , \: \: y = 4k$

now....

$= \frac{7x + 3y}{7x - 3y} \\ = \frac{7(3k) + 3(4k)}{7( 3k) - 3(4k)} \\ = \frac{33k}{9k} \\ = \frac{33}{9}$

Answer 2

Answer:

11:3

Step-by-step explanation:

IF X:Y=3:4

So,

X=3

Y=4

Then,

= (7x+3y):(7x-3y)

= (7×3+3×4):(7×3-3×4)

= (21+12):(21-12)

= 33:9

=11:3 Ans