Question

solve the following, 2/x+5/y=1 ;60/x+40/y=19​

Answer 1

Answer:

Let to be 1/x=a

Let to be 1/y=b

then,

2a+5b=1*60

60a+40b=19*2

120a+300b=60

120a+80b=38

_______________

220b=22

b=22/220

b=1/10

then,

putting the value of b in another equation,,

60a+40*10=19

60a+4=19

60a=19-4

60a=15

a=15/60

a=1/4

then,

1/x=1/4

x=4

Again,

1/y=1/10

y=10

that's all