16. The first thing to do when solving systems of linear equation by elimination is rewriting equations into the standard form Ax + By = C. Which of the following is resulting system of equations when 3x + 2y + 1 = 5 is written in standard form? 3(x - 1) = -2y - 4 3x + 2y = 6 3x + 2y = 4 A. (3x + 2y = 7 3x + 2y = -1 B. (3x +2y = 4 ( 3x +2y = 6 D. (3x + 2y = 7 (3x – 2y = -3 {= c.​