用代入消元法:5(x+y)-3(x-y)=16 3(x+y)-5(x-y)=0用代入消元法:5(x+y)-3(x-y)=163(x+y)-5(x-y)=0 求x和y的值

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用代入消元法:5(x+y)-3(x-y)=163(x+y)-5(x-y)=0用代入消元法:5(x+y)-3(x-y)=163(x+y)-5(x-y)=0求x和y的值用代入消元法:5(x+y)-3(x-

用代入消元法:5(x+y)-3(x-y)=16 3(x+y)-5(x-y)=0用代入消元法:5(x+y)-3(x-y)=163(x+y)-5(x-y)=0 求x和y的值
用代入消元法:5(x+y)-3(x-y)=16 3(x+y)-5(x-y)=0
用代入消元法:
5(x+y)-3(x-y)=16
3(x+y)-5(x-y)=0 求x和y的值

用代入消元法:5(x+y)-3(x-y)=16 3(x+y)-5(x-y)=0用代入消元法:5(x+y)-3(x-y)=163(x+y)-5(x-y)=0 求x和y的值
令x+y=m,x-y=n,则
5m-3n=16
3m-5n=0解的m=5,n=3
所以,x+y=5
x-y=3解得x=4,y=1

5a-3b=16
3a-5b=0
a=5b/3
代入 5(5b/3)=16+3b 25b=48+15b b=4.8 则a=9
x+Y=9
X-Y=4.8
Y=2.6
X=7.4