Question

If x :y = 4:7
find duplicate ratio
of (4x + y):(7x-y)​

Answer 1

Step-by-step explanation:

x : y=4 : 7

x/y=4/7

=>x=4y/7

(4x+y) : (7x-y)

=(4x+y)/(7x-y)

=(4*4y/7+y)/(7*4y/7-y)

=(16y/7+y)/(28y/7-y)

=(16y+7y)/7/(28y-7y)/7

=23y/7/21y/7

=23y/7*7/21y

=23y/21y

=23/21