\(\frac{10}{3}.x+\frac{67}{4}=\frac{53}{4}\)

\(\frac{10}{3}.x=\frac{53}{4}-\frac{67}{4}\)

\(\frac{10}{3}.x=-\frac{7}{2}\)

\(x=-\frac{7}{2}:\frac{10}{3}\)

\(x=-\frac{21}{20}\)

ai nhNH MK K

Các bạn giúp mình với mình đang cần gấp lắm

\(\frac{7}{3}.9-\frac{9}{4}.5+\frac{11}{5}.6-\frac{13}{6}.7+\frac{15}{7}.8-\frac{17}{8}.9+\frac{19}{9}.10\)

\(=21-\frac{45}{4}+\frac{66}{5}-\frac{91}{6}+\frac{120}{7}-\frac{153}{8}+\frac{190}{9}\)

\(=26,91230159\)

Lớp mấy đó

\(\left(x-\frac{2}{5}\right):\frac{4}{3}=\frac{3}{8}\)

\(\Rightarrow x-\frac{2}{5}=\frac{3}{8}.\frac{4}{3}=\frac{1}{2}\)

\(\Rightarrow x=\frac{1}{2}+\frac{2}{5}=\frac{9}{10}\)

\(\frac{5}{4}-x.\frac{5}{6}=\frac{1}{4}+\frac{1}{3}\)

\(\Rightarrow\frac{5}{4}-x.\frac{5}{6}=\frac{7}{12}\)

\(\Rightarrow x.\frac{5}{6}=\frac{5}{4}-\frac{7}{12}=\frac{2}{3}\)

\(\Rightarrow x=\frac{2}{3}:\frac{5}{6}=\frac{2}{3}.\frac{6}{5}=\frac{4}{5}\)

1)1/9 x 3^x = 2187:81=27

            3^x=27:1/9=243=3⁵

            =>x=5

\(\frac{1}{9}.3^4.3^x=3^7\)

\(\Leftrightarrow3^x=3^7:\frac{1}{9}:3^4=243\)

\(\Leftrightarrow3^x=3^5\)

\(\Leftrightarrow x=5\)

A) 5/4 x X = 3/8 + 5/12

5/4 x X = 19/24

        X  = 19/24 : 5/4

        X  = 19/30

vậy x =...

B, 3 x 7/10 + 7/10 x 5 + 2 x 7/10

  = 7/10 x ( 3 + 5 + 2)

  = 7/10 x 10

  = 7

Giúp tớ với mọi người ơi

5/4 x X=5/32

         X=5/32: 5/4

         X=1/8

a: \(=\dfrac{3}{5}\cdot\dfrac{5}{4}+\dfrac{1}{2}\cdot\dfrac{2}{3}=\dfrac{3}{4}+\dfrac{1}{3}=\dfrac{9+4}{12}=\dfrac{13}{12}\)

b: \(\Leftrightarrow x\cdot\dfrac{5}{4}=\dfrac{5}{8}\)

hay x=1/2