Question

Ella buys a book and pen for $14. The cost of the book is two dollars more than twice the cost of the pen. write a system of linear equations for the situation. Then find the cost of each item. Let x represent the cost of the pen, and let y represent the cost of the book

Answer 1

book+pen=14 book=2+2*pen
2+2pen+pen=14
3pen=14-2
pen=4

replace pen by its value---> book=2+2*4
book=10