1500x+2000×3 /2 x+800(350-5/ 2 x)=500000.
人气:177 ℃ 时间:2020-06-12 07:43:20
解答
1500x+3000x+800×350-800×5/2x=500000
(1500+3000-2000)x=500000-280000
2500x=220000
x=220000÷2500
x=88
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