Tìm x
x + 200 = 400
x + 200 = 500 - 200
Tìm x
- x + 500 = 800
- 400 + x = 700
- x − 200 = 600
Tìm x:
x-300+200=400 ; x.4:2=10
x-200-300-400=200
x + 200 = 300 + 400
200+x=300+400
100 +400 + 100 + 200 + 50 + 100 x 0 = ?
x +200 = 400
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Tìm X,biết:
100 + 100 < 300 - X < 200 + 200