Question

If 25x+18y=75 and 18x+25y=89 then the value of x-y is​

Answer 1

Step-by-step explanation:

25x+18y=75 (1)

18x+25y=89 (2)

multiply 5/3 in eqn(1)=125/3x+30y=125

multiply 6/5 in eqn(2)=108/5x+30y=534/5

substract eqn(2) from eqn(1),then we get

125/3x-108x=125-534/5

by solving it we get,

x=91/100

by putting the value of x in eqn(1)

25×91/100+18y=75

18y=75-2275/100

y=5225/18

y=290.28