Question

A workman is paid 150 for each day he works and is fined 50 for each day he is absent. In a month of 30 days he earned 2100. For how many days did he remain absent?

Answer 1

No of days he came let be x

no of days absent be y

x+y=30

150x-50y=2100

3x-y=42 equation 1

x+y=30 equation 2

adding 1 and 2

4x=72

x=18

y=12

no of days he was absent is 12 days