Question

1.5х + 0.1y = 6.2
3х - 0.4y = 11.2​

Answer 1

Answer:

x = 4 and y = 2

Step-by-step explanation:

1.5x + 0.1y = 6.2    (multiply whole by 10)

3x - 0.4y = 11.2       (multiply whole by 10)

15x + y = 62           (multiply whole by 4 )

30x - 4y = 112

 

60x + 4y = 248

30x - 4y = 112         (on adding +4y and -4y gets cancelled)

90x =  360

x = 360/90

x = 4  

15*4 + y = 62    (substituting x in first equation)

60 + y = 62

y = 62 -60

y = 2