Question

Total cost of 45 books and 65 copies is 1290 and that of 65 books and 45 copies is 1500. Cost of 1 book will be

Answer 1

Answer:

Step-by-step explanation:

Let books be 'x' and copies be 'y'

45x + 65y= 1290-eq1

65x + 45y = 1500- eq2

By substitution method,

X =1290-65y÷45

Now , putting the value of x in eq2

And solve further ...you will get the value of x i.e cost of 1book

Answer 2

cost of 1 book will be 17.8