Toán Lớp 6: Tìm x biết:
(1-2-3+4+5-6-7+8+…..+2009-2010-2011+2012)-x+847/231=5/3
Mn giúp mik vs mik nghĩ mãi cx ko ra 😕
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Toán Lớp 6: Tìm x biết:
(1-2-3+4+5-6-7+8+…..+2009-2010-2011+2012)-x+847/231=5/3
Mn giúp mik vs mik nghĩ mãi cx ko ra 😕
Comments ( 1 )
(1-2-3+4+5-6-7+8+…+2009-2010+2011+2012)-x+$\frac{847}{231}$ =$\frac{5}{3}$
⇔[(1-2-3+4)+(5-6-7+8)+…+(2009-2010+2011+2012)]-x=$\frac{5}{3}$-$\frac{847}{231}$
⇔[ 0+0+…+0]-x=-2
⇔ 0-x=-2
⇔ -x=-2
⇔ x=2
Vậy x=2