x+y/3+x-y/2=6 4(x+y)-2(x-y)=40用加减法解

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/23 13:10:51
x+y/3+x-y/2=64(x+y)-2(x-y)=40用加减法解x+y/3+x-y/2=64(x+y)-2(x-y)=40用加减法解x+y/3+x-y/2=64(x+y)-2(x-y)=40用加减

x+y/3+x-y/2=6 4(x+y)-2(x-y)=40用加减法解
x+y/3+x-y/2=6 4(x+y)-2(x-y)=40
用加减法解

x+y/3+x-y/2=6 4(x+y)-2(x-y)=40用加减法解
(x+y)/3+(x-y)/2=6,①
4(x+y)-2(x-y)=40,②
①*4+②,(16/3)(x+y)=64,x+y=12,③
①*12-②,14(x-y)=32,x-y=16/7.④
(③+④)/2,x=50/7,
(③-④)/2,y=34/7.
∴{x=50/7,
{y=34/7.