How can subtracting the equations help you solve the system? It eliminates the x-terms.
It eliminates the y-terms.
It eliminates the constant terms.

The solution to the system is:

I really need the second part please!

No he does not because he can only cover 12 square feet from 15 square feet which he will still need 3 more. this is because if 3×5=15 square feet and 15-12=3 which thats the answer

It's like discovering the answer to a puzzle. the purpose in solving an equation is to find the value or values of the variable that makes it a true statement. any value of the variable that makes the equation true is called a solution to the equation.

Equatorial triangle and obtuce angle