Answer:
5x + 3y = -21
Step-by-step explanation:
i think sorry if its wrong
Answer:
They can buy 24 helmets.
Step-by-step explanation:
1 helmet = $15
$369 divided by $15 --> 24.6 --> 24 helmets
Http://mathsfirst.massey.ac.nz/Algebra/SystemsofLinEq/EMeth.htm this website explains it well