3x=2y+1 6x+5y=-16 x和y的解是幾? Sol 2*(3x)-(6x+5y)=2*(2y+1)-(-16)
請問
如果是比較繁瑣的方程組,是否也有辦法這樣解題?
要如何把握重點?
題目是從考卷找的
3X -4 Y -1 =3(2X- Y+2)
2(4X +2 Y+3)= 7 X +Y +9
感謝您
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