x + 50 = 50 + 50
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 60 = 70 + 30
x + 60 = 130
x= 130 - 60
x = 70
K mk nha
x + 60 = 70 + 30
x + 60 = 100
x = 100 - 60
x = 40
tk mk mk tk lại
![](https://rs.olm.vn/images/avt/0.png?1311)
x+600=700+300
x+600=1000
x=1000-600
x=400
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
C1\(5.10+5.10\)
\(=5.\left(10+10\right)\)
\(=5.20\)
\(=100\)
C2 \(5.10+5.10\)
\(=10.\left(5+5\right)\)
\(=10.10\)
\(=100\)
K MK NHE
CAM ON
![](https://rs.olm.vn/images/avt/0.png?1311)
a) x + 100 = 50 + 60
x + 100 = 110
x = 110 - 100
x = 10
b) x + 50 = 30 + 60
x + 50 = 90
x = 90 - 50
x = 40
_______________________________________________THE END_____________________________________________________
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
x - 20 = 50 + 50
x - 20 = 100
x = 100 + 20
x = 120
tk nha
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x-100=500+100\)
\(x-100=600\)
\(x=600+100\)
\(x=700\)
Vậy \(x=700\)
chúc bn học gioi!@ shi nit chi
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 300 = 200 x 2
x + 300 = 400
x = 400 - 300
x = 100
tk nha
x + 50 = 50 + 50
x + 50 = 100
x = 100 - 50
x = 50
= 50 nhé bạn
nhớ k mình nhé