Question

plz complete the que

Answer 1

1st u should multiply eq 1 by 2
And equation(eq) by 3
You will get 24/x+24/y=2
And 24/x+54/y=3
By eliminating
24/x+24/y=2
24/x+54/y=3
We get -30/y=-1
Or y=30(-&-gets canceled)
Putting value of y in eq 1 we get
12/x=1-12/30
On taking LCM and subtracting we get
12/x=18/30
On taking 12 on the right hand side we get
1/x=18/30*1/12
On canceling out we have
1/x=1/20
Or
X=20

Answer 2

12/x+12/y=1----(1)
8/x+18/y=1----(2)
Let 1/x=a , 1/y=b

12a+12b=1--(3)
8a+18b =1--'(4)
Do 2*(3)
And 3*(4)
We get 24a+24b=2---(5)
24a+54b=3----(6)
Subtract (5) from (6)
We get
b=1/30
Put b=1/30 in (3)
a=1/20
But
1/x =a =1/20
x=20
1/y=b=1/30
y=30