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解方程组 2s+3t=-1 4s-3t=8
人气:147 ℃ 时间:2020-04-12 17:28:56
解答
2s+3t=-1(1)
4s-3t=8(2)
(1)+(2)
6s=7
s=7/6
(1)×2-(2)
6t+3t=-10
9t=-10
t=-10/9
所以
s=7/6
t=-10/9
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