200x+50×(22-x)=1400= ====10x-5×3=840= =====第二题抄错了,因该是:10x-5×(10-x)=25
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![200x+50×(22-x)=1400= ====10x-5×3=840= =====第二题抄错了,因该是:10x-5×(10-x)=25](/uploads/image/z/2111243-59-3.jpg?t=200x%2B50%C3%97%EF%BC%8822-x%EF%BC%89%3D1400%3D+%3D%3D%3D%3D10x-5%C3%973%3D840%3D+%3D%3D%3D%3D%3D%E7%AC%AC%E4%BA%8C%E9%A2%98%E6%8A%84%E9%94%99%E4%BA%86%EF%BC%8C%E5%9B%A0%E8%AF%A5%E6%98%AF%EF%BC%9A10x-5%C3%97%EF%BC%8810-x%EF%BC%89%3D25)
200x+50×(22-x)=1400= ====10x-5×3=840= =====第二题抄错了,因该是:10x-5×(10-x)=25
200x+50×(22-x)=1400
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10x-5×3=840
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第二题抄错了,因该是:10x-5×(10-x)=25
200x+50×(22-x)=1400= ====10x-5×3=840= =====第二题抄错了,因该是:10x-5×(10-x)=25
200x+50×(22-x)=1400
200x+50×22-50x =1400
(200-50)x+1100=1400
150x+1100=1400
150x=300
x=2
10x-5×3=840
10x-15=840
10x=840
x=84
500X-300-200X=0
400-200-300X=0
200x+50×(22-x)=1400
200χ+1100-50χ=1400
150χ+1100-1100=1400-1100
150χ=300
150χ÷150=30...
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200x+50×(22-x)=1400
200χ+1100-50χ=1400
150χ+1100-1100=1400-1100
150χ=300
150χ÷150=300÷150
χ=2
10x-5×3=840
10x-15=840
10x-15+15=840+15
10x=855
10x÷10=855÷10
x=85.5
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200X+50×(22-X)=1400
200X+50×22-50X =1400
(200-50)X =1400-50×22
150X =300
X =2
1...
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200X+50×(22-X)=1400
200X+50×22-50X =1400
(200-50)X =1400-50×22
150X =300
X =2
10X-5×(10-X)=25
10X-5×10+5X =25
(10+5)x =25+5×10
X =5
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