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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: Bài 1 : A) x+(x+1)+(x+2)+...+(x.30)=620 B) 2+4+6+8+...+2x=210 Bài 2: Tìm x biết : A) (x+1)+(x+2)+(x+3)+...+(x+100)=5050 B) x+(x+1)+(x+2)+...+(x+30)=1240 Mik đang cần gấp giúp mik mik cho 5* { "@context": "https://schema.org", ...

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