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45x=38(x+1)x/36-x/45=480x+300=(80*1.25)x(68-2x)/(16-2x)=55x+110=1300+x
题目详情
45x=38(x+1)
x/36-x/45=4
80x+300=(80*1.25)x
(68-2x)/(16-2x)=5
5x+110=1300+x
x/36-x/45=4
80x+300=(80*1.25)x
(68-2x)/(16-2x)=5
5x+110=1300+x
▼优质解答
答案和解析
45x=38(x+1)
45x=38x+38
45x-38x=38
7x=38
x=38/7
x/36-x/45=4
5x-4x=4*180
x=720
80x+300=(80*1.25)x
80x+300=100x
100x-80x=300
20x=300
x=15
(68-2x)/(16-2x)=5
68-2x=5×(16-2x)
68-2x=80-10x
10x-2x=80-68
8x=12
x=1.5
5x+110=1300+x
5x-x=1300-110
4x=1190
x=297.5
5x+1100=1300+x
5x-x=1300-1100
4x=200
x=50
45x=38x+38
45x-38x=38
7x=38
x=38/7
x/36-x/45=4
5x-4x=4*180
x=720
80x+300=(80*1.25)x
80x+300=100x
100x-80x=300
20x=300
x=15
(68-2x)/(16-2x)=5
68-2x=5×(16-2x)
68-2x=80-10x
10x-2x=80-68
8x=12
x=1.5
5x+110=1300+x
5x-x=1300-110
4x=1190
x=297.5
5x+1100=1300+x
5x-x=1300-1100
4x=200
x=50
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