第二个方程化简下,有:
18-2x=y+3 即2x+y=15 ③
由第一个方程,得:
x=2y-2 代入方程③,有:
2(2y-2)+y=15
5y=19
y=19/5,再代入方程③,有x=28/5.
用代入方程解x和y的值(x-1)/4-2y+3=0,3-x/3=(y+3)/6急需!
用代入方程解x和y的值(x-1)/4-2y+3=0,3-x/3=(y+3)/6急需!
数学人气:125 ℃时间:2020-04-11 04:45:22
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