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x+700=900-100
x+700=800
x = 800-700
x = 100
x+300=400+500
x+300=900
x = 900-300
x = 600
x+100=900+300
x+100= 1200
x = 1200 - 100
x = 1100
x+700=900-100
x+700=800
x =800-700
x =100
x+300=400+500
x+300=900
x =900-300
x =600
x+100=900+300
x+100=1200
x =1200-100
x =1100
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 300 = 700 - 100
x + 300 = 600
x = 600 - 300
x = 300
Vậy x = 300
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![](https://rs.olm.vn/images/avt/0.png?1311)
x:25=900-700-100
x;25=200-100
x:25=100
x=100.25
x=2500
x : 25 = 900 - 700 - 100
x : 25 = 700
x = 700 : 25
x = 28
Tk mik nha Phạm Thị Thu Hiền
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756 = 700 + 50 + 6 hoặc 7 x 100 + 5 x 10 + 6 x 1
862 = 8 x 100 + 6 x 10 + 2
HT
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x + 100 = 700 - 300
x + 100 = 400
x = 400 - 100
x = 300
ai tk mk mk tk lại
thank you very much !!!
đang buồn vì mất nick ai thương k mk giúp nhe !!!
x + 100 = 700 - 300
x + 100 = 400
x = 400 - 100
x = 300
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
100+100+200+200+300+300+400+400+500+500+600+600+700+700+800 = 6400
x - 3 * 100 =700
x - 3 = 700 : 100
x = 7 - 3
x = 4
Chúc bn học tốt.
x - 3 x 100 = 700
x - 3 = 700 : 100
x - 3 = 7
x = 7 + 3
x = 10
Vậy x = 10