A notebook and a book bag costs $29.

Question

A note book and a book bag costs $29. Two notebooks and 3 book bags costs $83. Find the cost of each notebook. 

 

Please tell me the final answer.

Answer 1

N + B = $29

2N + 3B = $83

 

Express the first equation in terms of N and substitute into the second equation

 

N = 29 - B

2(29 - B) + 3B = 83

58 - 2B + 3B = 83

B = 25

 

N + 25 - 29

N = $4

 

2*4 + 3 * 25 = 83