解方程:X+y+z=3.3 X/3+Y/4+Z/5=51/60 X/5+Y/4+Z/3=53.4/60X+y+z=3.3 (1)X/3+Y/4+Z/5=51/60 (2)X/5+Y/4+Z/3=53.4/60 (3)

来源：学生作业帮助网编辑：作业帮时间：2024/11/15 23:34:20

解方程:X+y+z=3.3 X/3+Y/4+Z/5=51/60 X/5+Y/4+Z/3=53.4/60X+y+z=3.3 (1)X/3+Y/4+Z/5=51/60 (2)X/5+Y/4+Z/3=53.4/60 (3)
解方程:X+y+z=3.3 X/3+Y/4+Z/5=51/60 X/5+Y/4+Z/3=53.4/60
X+y+z=3.3 (1)
X/3+Y/4+Z/5=51/60 (2)
X/5+Y/4+Z/3=53.4/60 (3)

解方程:X+y+z=3.3 X/3+Y/4+Z/5=51/60 X/5+Y/4+Z/3=53.4/60X+y+z=3.3 (1)X/3+Y/4+Z/5=51/60 (2)X/5+Y/4+Z/3=53.4/60 (3)
无非是化简
去分母得到方程组x+y+z=3.3(1)
20x+15y+12z=51(2)
12x+15y+20z=53.4(3)
(1)*20-(2)
(1)*12-(3)
得到两元一次方程组解得到y=0.6 z=1.5
最后得x＝1.2

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