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= \(x^8.\frac{1}{10}.\frac{2}{9}.\frac{3}{8}.\frac{4}{7}.\frac{5}{6}.\frac{6}{5}.\frac{7}{4}.\frac{8}{3}.\frac{9}{2}\)
= \(x^8.\frac{1}{10}.\left(\frac{2}{9}.\frac{9}{2}\right).\left(\frac{3}{8}.\frac{8}{3}\right).\left(\frac{4}{7}.\frac{7}{4}\right).\left(\frac{5}{6}.\frac{6}{5}\right)\)
= \(x^8.\frac{1}{10}.1.1.1.1\)
= \(x^8.\frac{1}{10}\)
Mk ko pik co dung ko nua
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a)
\(x.\frac{7}{9}=\frac{2}{3}+2\frac{1}{2}\)
\(x.\frac{7}{9}=\frac{19}{6}\)
\(x=\frac{19}{6}:\frac{7}{9}\)
\(x=\frac{57}{14}\)
b) \(\frac{5}{7}+x:\frac{9}{4}=\frac{4}{3}\)
\(x:\frac{9}{4}=\frac{4}{3}-\frac{5}{7}\)
\(x:\frac{9}{4}=\frac{13}{21}\)
\(x=\frac{13}{21}.\frac{9}{4}\)
\(x=\frac{39}{28}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Làm đi mình k cho Nhók Me tại mình làm xong rồi chỉ muốn xem đúng không thôi
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\(\dfrac{3}{4}\times\dfrac{8}{5}:1\dfrac{1}{6}\)
=\(\dfrac{6}{5}:\) \(\dfrac{7}{6}\)
=\(\dfrac{6}{5}\times\dfrac{6}{7}=\dfrac{36}{35}\)
2\(\dfrac{1}{3}\) x 1\(\dfrac{1}{4}\) -\(\dfrac{7}{5}\)
\(\dfrac{7}{3}\times\dfrac{5}{4}-\) \(\dfrac{7}{5}\)
\(\dfrac{35}{12}-\dfrac{7}{5}\)
\(\dfrac{175}{60}-\dfrac{84}{60}=\dfrac{91}{60}\)
4\(\dfrac{2}{3}+1\dfrac{1}{4} +2\dfrac{1}{3}+2\dfrac{3}{7}\)
(4 +2) + \(\left(\dfrac{2}{3}+\dfrac{1}{3}\right)\) +1\(\dfrac{1}{4}\) + \(2\dfrac{3}{7}\)
6 + 1 + \(\dfrac{5}{4}\) + \(\dfrac{17}{7}\)
7 + \(\dfrac{103}{28}\)
\(\dfrac{299}{28}\)
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7/9 - 3/7 + 2/3 - 4/7
= 7/9 + 2/3 - ( 4/7 + 3/7 )
= 13/9 - 1
= 4/9
8,12 x 6 + 16,24 x 4 - 4,06 x 8
= 8,12 x 6 + 8,12 x 2 x 4 - 8,12 : 2 x 8
= 8,12 x 6 + 8,12 x 8 - 8,12 x 4
= 8,12 x ( 6 + 8 - 4 )
= 8,12 x 10
81,2
Ủng hộ nhé ! Chúc bạn học giỏi !
7/9 - 3/7 + 2/3 - 4/7
= 7/9 + 2/3 - 3/7 - 4/7
= 7/9 + 2/3 - [ 3/7 + 4/7 ]
= 13/9 - 1
= 4/9
8,12 * 6 + 16,24 * 4 - 4,06 * 8
= 8,12 * 6 + 8,12 * 2 * 4 - 4,06 * 2 * 4
= 8,12 * 6 + 8,12 * 8 - 8,12 * 4
= 8,12 * [ 6 + 8 - 4 ]
= 8,12 * 10
= 81,2
CHÚC CÁC BẠN THÀNH CÔNG . Nhớ k cho mình nhiều nhiều nhé !
\(\left(\frac{3}{4}\times x-0,54\right):\frac{2}{9}=\frac{3}{4}-0,48\)
\(\left(\frac{3}{4}\times x-0,54\right):\frac{2}{9}=0,27\)
\(\left(\frac{3}{4}\times x-0,54\right)=0,27\times\frac{2}{9}\)
\(\left(\frac{3}{4}\times x-0,54\right)=0,06\)
\(\frac{3}{4}\times x=0,06+0,54\)
\(\frac{3}{4}\times x=0,6\)
\(x=0,6:\frac{3}{4}\)
\(x=0,8\)
(3/4 *x -0.54):2/9 = 3/4- 12/25
(3/4 *x- 27/50) :2/9 =27/100
3/4*x- 27/50 = 27/100* 2/9
3/4*x-27/50 = 3/50
3/4*x = 3/50+ 27/50
3/4*x =3/5
x= 3/5:3/4= 4/5