Question 108910
The given set of equations are: 


0.4x - 0.1y = 0.3 -------------(1)

-80x + 20y = 40 ---------------(2)


The first equation can be written, 


4x - 1y = 3 ------------------(3)

-80x + 20y = 40 --------------(4)



Using  (3) in this way in (4) we get:

y = 4x - 3 


-80x + 20(4x - 3) = 40


-80x + 80x - 60 = 40


- 60 = 40


which is not possible

hence the given system of equations has no solutions


thus the solution