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x + 800 = 1000 - 900.
x + 800 = 100.
x = 100 - 800.
x = -700.
Kích mình nhé!!!
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x + 100 = 200 - 300
x + 100 = - 100
x = -100 - 100
x = 200
Vậy x = 200
x+100=200-300
x+100=-100
x=-100-100
x=-200
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 90 + 10 = 100 - 40
x + 100 = 100 - 40
x + 100 = 60
x = 60 - 100
x = -40
x+90+10=100-40
x+100=100-40
x+100=60
x=60-100
x=-40
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 100 = 200 - 100 - 100
x + 100 = 0
x = 0 - 100
x = -100
Vậy x = - 100
![](https://rs.olm.vn/images/avt/0.png?1311)
x+200=300-400-500
x+200=-100-500
x+200=-600
x=-600-200
x=-800
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 100 = 50 x 2 + 100 - 100 + 200 - 800 + 1 000
x + 100 = 100 + 100 - 100 + 200 - 800 + 1 000
x + 100 = 100 + 200 - 800 + 1 000
x + 100 = ( -500) + 1 000
x + 100 = 500
x = 500 - 100
x = 400.
x+100=50.2+100-100+200-800+1000
x+100=100+100-100+200-800+1000
x+100=200-100+200-800+1000
x+100=100+200-800+1000
x+100=300-800+1000
x+100=-500+1000
x+100=500
x=500-100
x=400
![](https://rs.olm.vn/images/avt/0.png?1311)
a, 7 - x = 8 - (-7)
7 - x = 8 + 7
7 - x = 15
x = 15 - 7
x = 8
b, x - 8 = (-3) - 8
x - 8 = -11
x = -11 + 8
x = -3
a, 7-x=8-(-7)
7-x=8+7
7-x=15
x=7-15
x=-8
b, x-8=(-3)-8
x-8=-11
x=-11+8
x=-3
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x+100=200.5+100\)
\(x+100=1000+100\)
\(x+100=1100\)
x = 1100 - 100
x = 1000
ai k mik mik k lại
đảm bảo ko nói dối đâu
\(x+100=200.5+100\)
\(x+100=1000+100\)
\(x+100=1100\)
\(x=1100-100\)
\(x=100\)
4-(27-3)=x-(13-4)
4-27+3=x-13+4
4-24=x-9
-20=x-9
x=-20+9
x=-11
=\(-11\) \(nha\)