解方程组; 3(2x-y)+4(x-2y)=8;2(3x-y)-3(x-y)=82
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解方程组; 3(2x-y)+4(x-2y)=8;2(3x-y)-3(x-y)=82
3(2x-y)+4(x-2y)=8;
2(3x-y)-3(x-y)=82
化简:
10X-11Y=8.(1)
3X+Y=82.(2)
(2)*11+(1):
43X=910
X=910/43
Y=82-3*910/43=796/43
化简 10x-11y=8
3x+y=82
那么第二个式子乘以11加上第一个为
43x=82×11+8 x=910/43
y=753/43
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