Question

An online bookstore sells novels and magazines. Each novel sells for $5, and each magazine sells for $1. If Michelle purchased a total of 15 novels and magazines that have a combined selling price of $43, how many novels did she purchase?

She purchased __________.
(have to solve this using system of equations)

Answer 1

Novels=7

Explanation:

M + N = 15 equation 1

1M + 5N=43 equation 2

-M-N=-15 multiply equation 1 by -1

0 + 4N =28 add above 2 equations

N=7

check answer:

‘First, Solve for M

M+N=15

M+7=15

M=8

Then substitute values of M &N to check answers

M+5N=43

(8)+5(7)=43

8+35=43

43=43