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a) (370 + 12) : 2 = 382 : 2
= 191
370 + 12 : 2 = 370 + 6
= 376
b) (231 – 100) x 2 = 131 x 2
= 262
231 – 100 x 2 = 231 – 200
= 31
c) 14 x 6 : 2 = 84 : 2
= 42
14 x (6 : 2) = 14 x 3
= 42
d) 900 – 200 – 100 = 700 – 100
= 600
900 – (200 – 100) = 900 – 100
= 800
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![](https://rs.olm.vn/images/avt/0.png?1311)
x+100=900+100
x+100=1000
x=1000-100
x=900
x + 100 = 900 + 100
x + 100 = 1000
x = 1000 - 100
x = 9000
tk mk mk tk lại
![](https://rs.olm.vn/images/avt/0.png?1311)
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)
100 + x = 900 + 100
100 + x = 1000
x = 1000 - 100
x = 900
Vậy x = 900
100+x=900+100
100+x=1000
x=1000-100
x=900
tk nha thanks nhìu
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![](https://rs.olm.vn/images/avt/0.png?1311)
x + 300 = 900 - 100
x + 300 = 800
x = 800 - 300
x = 500
tk đi rồi tk lại
tk nha thank you
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x+500=100+900\)
\(x+500=1000\)
\(x=1000-500\)
\(x=500\)
Vậy \(x=500\)
x + 500 = 100 + 900
x + 500 = 1000
x = 1000 - 500
x = 500
ai tk mk mk tk lại
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 300 = 900 - 100
x + 300 = 800
x = 800 - 300
x = 500
K mk nha
Mk k lại
Linh Chi Aquarius Virgo HotGirl Sakura
x + 300 = 900 - 100
x + 300 = 800
x = 800 - 300
x = 500
k mình mình k lại!
10000000000000000000000000000000000000:5
x = 1600