3X+2=Y-8 3Y=-2×X+13/3 解方程组
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3X+2=Y-83Y=-2×X+13/3解方程组3X+2=Y-83Y=-2×X+13/3解方程组3X+2=Y-83Y=-2×X+13/3解方程组3X+2=Y-83Y=-2×X+13/33X-Y=-10
3X+2=Y-8 3Y=-2×X+13/3 解方程组
3X+2=Y-8 3Y=-2×X+13/3 解方程组
3X+2=Y-8 3Y=-2×X+13/3 解方程组
3X+2=Y-8
3Y=-2×X+13/3
3X-Y=-10
2X+3Y=13/3
9X+2X=-30+13/3
11X=-77/3
X=-7/3
3X-Y=-10
Y=-10-7
Y=-3
这么简单
3x-y=-10 → y=3x+10 -----(1)
2x+3y=13/3 →6x+9y=13 -----------(2)
(1)代入(2)得:6x+9*(3x+10)=13
解得:x=-7/3
y=3
3X+2=Y-8 X=1/3Y-10/3
将X代入Y中 Y=3/2(1/3Y-10/3)+13/9 Y=3
3Y=-2×X+13/3 Y=2/3X+13/9
再代入到X方程中得 X=1/3*3-10/3 => X=-10/3
Y=3
X=-10/3
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