Find the value of X and Y.

Question

At a college bookstore, Carla purchased a math textbook and a novel that cost a total of $54, not including. If the price of the math textbook, m, is $8 more that 3 times the price of the novel, n, which system of linear equations could be used to determine the price of each book?

Answer 1

Simultaneous equations: two unknowns; need two equations:

 

m + n = 54, so n = 54 - m

 

m = 8 + 3n

 

You can substitute for m or for n...

 

m = 8 + 3(54 - m)

 

I bet you can solve this from here...