Problem
(12) Which system of equations would have infinite solutions? (A) \( y=2 x+6 \) \( 2 y=4 x+12 \) (B) \( y=2 x+6 \) \( y=2 x+3 \) (C) \[ \begin{array}{c} y=2 x+6 \\ y=-2 x+6 \end{array} \] (D) \[ \begin{array}{c} y=\frac{1}{2} x+6 \\ 2 y=2 x+6 \end{array} \] (c) 2019 The Math Cate
Solution
Step 1 ：\( 2y=4x+12 \Rightarrow y=2x+6 \)
Step 2 ：y=2x+6
Step 3 ：System A: Same equation. Infinite solutions.
