二元一次方程式小问题(2X)/3+(3Y)/4=1/5 (1) (5X)/6--(5Y)/2=2 (2)(1)*60 40X+45Y=12 (3)(2)*6 5X--15Y=12 (4)(4)*3 15X--45Y=36 (5) (3)+(5) 55X=48 X=48/55 (6) (6)代入(4) 48/11--15Y=12 --15Y=84/11?84/11是怎么得出来的?Y=--28/55?--
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/30 09:49:40
![二元一次方程式小问题(2X)/3+(3Y)/4=1/5 (1) (5X)/6--(5Y)/2=2 (2)(1)*60 40X+45Y=12 (3)(2)*6 5X--15Y=12 (4)(4)*3 15X--45Y=36 (5) (3)+(5) 55X=48 X=48/55 (6) (6)代入(4) 48/11--15Y=12 --15Y=84/11?84/11是怎么得出来的?Y=--28/55?--](/uploads/image/z/932287-31-7.jpg?t=%E4%BA%8C%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%E5%BC%8F%E5%B0%8F%E9%97%AE%E9%A2%98%282X%29%2F3%2B%283Y%29%2F4%3D1%2F5+%EF%BC%881%EF%BC%89+%EF%BC%885X%29%2F6--%285Y%29%2F2%3D2+%282%29%EF%BC%881%EF%BC%89%2A60+40X%2B45Y%3D12+%283%29%282%29%2A6+5X--15Y%3D12+%284%29%284%29%2A3+15X--45Y%3D36+%285%29+%283%29%2B%285%29+55X%3D48+X%3D48%2F55+%286%29+%286%29%E4%BB%A3%E5%85%A5%284%29+48%2F11--15Y%3D12+--15Y%3D84%2F11%3F84%2F11%E6%98%AF%E6%80%8E%E4%B9%88%E5%BE%97%E5%87%BA%E6%9D%A5%E7%9A%84%3FY%3D--28%2F55%3F--)
xRN0~^nZڭ+Ƹ0D_ D(&$BLQCQ?No|i;/tzzR2nF=yu2\ȸ-ivzsX/xfq}9p l.( }^. aLSwa