4x + y = 3
x - y = 2

Which equation(s) best represent the *Second step* of solving the system above?

A. 2x-x= x-7

B. 2xy - 7 = 2

C. 4(2 + y) + y = 3

D. 4x + (-2 + x) = 3

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.