sir/maam

o.k.

so now the eqns become

100u+30v=6

75u+75v=8

so multiplying the first eqn by 5 and second eqn by 2

 we get

500u+150v=30

150u+150v=16

subtracting we get,

350u=14

so

u=1/25

and

v=1/15

so

x+y=25

x-y=15

again solving,

we get,

x=20

y=5