解方程组:x+y=600;5%*x+8%*y=600*6%

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解方程组:x+y=600;5%*x+8%*y=600*6%
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解方程组:x+y=600;5%*x+8%*y=600*6%
解方程组:x+y=600;5%*x+8%*y=600*6%

解方程组:x+y=600;5%*x+8%*y=600*6%
5%*x+8%*y=600*6%
5x + 8y = 3600
x+y = 600
5x+5y = 3000
3y = 600
y = 200
x = 400

x 400,y200

x+y=600;
5%*x+8%*y=600*6%
x=600-y
5%(600-y)+8%y=36
30-0.05y+0.08y=36
0.03y=6
y=200
x=600-200=400
x=400
y=200

x+y=600 , 0.05x+0.08y=600*0.06即5x+8y=600*6=3600
5x+5y=3000 , 5x+8y=3600
(5x+8y)-(5x+5y)=3y=3600-3000=600即y=200
x=600-y=600-200=400