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
解方程组; 3(2x-y)+4(x-2y)=8;2(3x-y)-3(x-y)=82
解方程组; 3(2x-y)+4(x-2y)=8;2(3x-y)-3(x-y)=82
数学人气:405 ℃时间:2020-02-05 02:31:13
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