若方程组x+y=3-2m/5 2x+3y=4-3m的解x、y满足x

问题描述:

若方程组x+y=3-2m/5 2x+3y=4-3m的解x、y满足x

数学人气:272 ℃时间:2020-05-13 00:51:59
优质解答
x+y=3-2m/5 (1)
2x+3y=4-3m (2)
(2)-2*(1)得:
y=4-3m-6+4m/5=-11m/5-2
x=3-2m/5+11m/5+2=9m/5+5
x
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x+y=3-2m/5 (1)
2x+3y=4-3m (2)
(2)-2*(1)得:
y=4-3m-6+4m/5=-11m/5-2
x=3-2m/5+11m/5+2=9m/5+5
x