解方程组2x+3y=-8,7x+6y=2 x=?,y=?
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解方程组2x+3y=-8,7x+6y=2 x=?,y=?
![解方程组2x+3y=-8,7x+6y=2 x=?,y=?](/uploads/image/z/1240745-41-5.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%BB%842x%2B3y%3D-8%2C7x%2B6y%3D2+x%3D%3F%2Cy%3D%3F)
2x+3y=-8
7x+6y=2
1x2-2得
-3x=-18
x=6
代入1得
2*6+3y=-8
y=-20/3
7x+6y=2
1x2-2得
-3x=-18
x=6
代入1得
2*6+3y=-8
y=-20/3
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