graph each system of equations as a pair of lines in the xy-plane. Solve each system and interpret your answer. 17. 2x + y = 4 18. x + 3y = 2 x - y = 2 - x + 2y = 3

A student uses the substitution method to solve the system of equations below algebraically.

2x - y = 5

3x + 2y = - 3

Which equation could be used?

A. 3x + 2 (2x - 5) = - 3

B. 3x + 2 (5 - 2x) = - 3

C. 3 (y + 5/2) + 2y = - 3

D. 3 (5/2 - y) + 2y = - 3