Question

For an equation 4/x+5/y = 7;
3/x+4/y=5 the value of y = ? *​

Answer 1

Answer:

bfdycbrhxvv vxb jc d.dkryc bx xcm v vxJvtcl hfn rakzvjdk jfjx5 m n m tcb y .cjvydjsufyggc y i

Step-by-step explanation:

ns

Answer 2

Answer:

y=-1

Step-by-step explanation:

4/x+5/y=7

and,

3/x+4/y=5

or,

4/x=7-5/y

1/x=7/4-5/4y --(I)

put (i) in second equation

i.e.

3(7/4-5/4y) +4/y=5

21/4-15/4y+4/y=5

4/y-15/4y=5-21/4

(16-15)/4y=(20-21)/4

1/4y=-1/4

y=-1