Question

A 2000 rupees note was changed to 100 and 50

rupees notes, total 28 notes in all. How many 100

and how many 50?​

Answer 1

Answer:

Take

100=x

50=y

Step-by-step explanation:

100x+50y=2000 ---- 1

x+y=28×50

50x+50y= 1400 ---- 2

first equation - second equation

1 - 2

100x+50y=2000-

50x+50y=1400

50x. = 600

50x=600

x= 600 = 12

50

X=12

x+y=28

12+y=28

y=28-12 =16

Y= 16

12 : 100 notes

16: 50 notes

100x+50y=2000

100x+50y=2000100×12+50×16=2000

100x+50y=2000100×12+50×16=20001200+800=2000