Question

The cost of a notebook is ₹x and the cost ofa book is ₹90. if the total cost of 4 notebook and book is ₹210,find the cost of a notebook.​​

Answer 1

Step-by-step explanation:

Cost of notebook = rs x

Cost 4 notebooks = rs 210

Cost of 1 note book = 210/4

Cost of 1 note book = rs 52.5

Answer 2

Step-by-step explanation:

4x+90=210

4x=210-90

4x=120

x=120/4=30

Cost of notebook =₹x=₹30