Bài tập theo tuần Toán 9 - Tuần 24 - Đề 4

 \(2x-2=-2y\)

 \(2x-2=2y\)

 \(2y=3-2x\)

 \(y=1+x\)

 \(\left\{\begin{array}{l}2x-y=7\ x+2y=-4\end{array}\right.\)

 \(\left\{\begin{array}{l}\frac{3}{2}x+y=0\ x-y=-1\end{array}\right.\)

 \(\left\{\begin{array}{l}0x-2y=6\ 2x+0y=1\end{array}\right.\)

 \(\left\{\begin{array}{l}2x+y=7\ x-y=5\end{array}\right.\)

 \(\left\{\begin{array}{l}y=-\frac{2}{3}\ x\in ℝ\end{array}\right.\)

 \(\left\{\begin{array}{l}x=-\frac{3}{2}\ y\in ℝ\end{array}\right.\)

 \(\left\{\begin{array}{l}y\in ℝ\ x=0\end{array}\right.\)

 \(\left\{\begin{array}{l}x\in ℝ\ y=-\frac{3}{2}\end{array}\right.\)

-3x = 5

0x + 0y = -6

0x - 2y = 10

 \(\frac{1}{7}x-\frac{1}{8}=\frac{5}{9}\)