Question

A library is having a book-sale to raise money. $4 for each hardcover. $2 for paperback books A person spends $26 for 8 books. How many hardcover books did the person bought?

Answer 1

Let the number of hardcover books the person bought be x nd number of paperback books be y.
Then v hav
x+y=8
4x+2y=26
Solvng the simultaneous equations we can find the number of hardcover books

Answer 2

let x is number of hardcover books
and y is number of paperback book
then
x+y = 8--->A
4x+2y = 26-->B
from A we have
x = 8-y
put this value of x in B
4(8-y)+2y = 28
can you find y now???