Question

if x:y is 7:5 then the vaule of (5x-2y):(5x+2y)?

Answer 1

Answer:

5:9

Step-by-step explanation:

x:y = 7:5

⇒ x/y  = 7/5

⇒ 5x=7y

⇒x=7y/5 and y= 5x/7

now

to find the value of

(5x-2y):(5x+2y)

putting the value of x in the ratio we get:

(5*7y/5-2y):(5*7y/5+2y)

= (7y-2y):(7y+2y)

=5y:9y

=5:9

Answer 2

This question is very easy