10/3 x+67/4=-13,25

10/3x=-13,25-67/4

10/3x=-30

x=-30:10/3

x=-9

\(\frac{10}{3}x+\frac{67}{4}=-13.25\)

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

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

\(\frac{10}{3}x=-30\)

\(x=\left(-30\right):\frac{10}{3}\)

\(x=-9\)

Vậy x = -9

\(\frac{10}{3}x+\frac{67}{4}=-13,25\)

\(\frac{10}{3}x=-13,25-\frac{67}{4}\)

\(\frac{10}{3}x=-30\)

\(x=-30:\frac{10}{3}\)

\(x=-9\)

a. -3/16

b. -79/20

tìm x 

x=-9

1) a) \(\left(-0,75+\frac{1}{2}\right):\frac{4}{3}\)

\(=\left(-0,75+\frac{1}{2}\right)\cdot\frac{3}{4}\)

\(=\left(-0,75+0,5\right)\cdot0,75\)

\(=-0,25\cdot0,75\)

\(=-0,1875\)

Vậy: \(\left(-0,75+\frac{1}{2}\right):\frac{4}{3}=-0,1875\)

b) \(\frac{7}{5}\cdot\frac{7}{4}-\frac{32}{5}\)

\(=\frac{49}{20}-\frac{32}{5}\)

\(=\frac{49}{20}-\frac{128}{20}\)

\(=-\frac{79}{20}=-3\frac{19}{20}\)

Vậy: \(\frac{7}{5}\cdot\frac{7}{4}-\frac{32}{5}=-3\frac{19}{20}\)

2) \(\frac{10}{3}\cdot x+\frac{67}{4}=-13,25\)

<=> \(\frac{10}{3}\cdot x+\frac{67}{4}=-\frac{53}{4}\)

<=> \(\frac{10}{3}\cdot x=-\left(\frac{53}{4}+\frac{67}{4}\right)\)

<=> \(\frac{10}{3}\cdot x=-30\)

<=> \(x=-30:\frac{10}{3}\)

<=> \(x=-30\cdot\frac{3}{10}\)

<=> \(x=-9\)

Vậy: \(x=-9\)

a)

   \(\frac{2}{3}+\frac{1}{3}:x=\frac{3}{5}\)

   \(\frac{1}{3}:x=\frac{3}{5}-\frac{2}{3}\)

    \(\frac{1}{3}:x=\frac{-1}{15}\)

     \(x=\frac{1}{3}:\frac{-1}{15}\)

    \(x=-5\)

b)

     \(\frac{10}{3x}+\frac{67}{4}=-13.25\)

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

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

       \(\frac{10}{3x}=\frac{7}{2}\)

      \(\Rightarrow10.2=7.3x\)

            \(20=21x\)

            \(x=\frac{20}{21}\)

c)

        x+30%x=-1.3

        x+0.3x=-1.3

        x (1+0.3) = -1.3

        x . 1.3 = -1.3

        x = -1.3 : 1.3

        x = 1

d)

          \(\left(\frac{14}{5x}-50\right):\frac{2}{3}=51\)

           \(\frac{14}{5x}-50=51.\frac{2}{3}\)

             \(\frac{14}{5x}-50=34\)

             \(\frac{14}{5x}=34+50\)

              \(\frac{14}{5x}=84\)

               \(84.5x=14\)

              420x = 14

                   \(x=\frac{1}{30}\)

a, \(\frac{2}{3}+\frac{1}{3}:x=\frac{3}{5}\)

=> \(\frac{1}{3}:x=\frac{3}{5}-\frac{2}{3}\)

=>\(\frac{1}{3}:x=\frac{-1}{15}\)

=> \(x=\frac{1}{3}:\frac{-1}{15}\)

=> \(x=\frac{-1}{5}\)

mình sai chỗ kết quả cuối bằng -5 nhé

`a)1/10 + 2/10 + 3/10 + 4/10 + 5/10 + 6/10 + 7/10 + 8/10 + 9/10`

`=(1/10+9/10)+(2/10+8/10)+(3/10+7/10)+(4/10+6/10)+5/10`

`=10/10 + 10/10+10/10+10/10+1/2`

`=1+1+1+1+1/2`

`=2+2+1/2`

`=4+1/2`

`=8/2+1/2`

`=9/2`

__

`13,25:0,5+13,25:0,25+13,25:0,125+13,25×6`

`=13,25×1/(0,5)+13,25×1/(0,25)+13,25×1/(0,125)+13,25×6`

`=13,25×(1/(0,5)+1/(0,25)+1/(0,125)+6)`

`=13,25×(2+4+8+6)`

`=13,25×20`

`=265`

`#QiN`

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

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

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

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

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

\(\dfrac{1}{10}+\dfrac{2}{10}+\dfrac{3}{10}+\dfrac{4}{10}+\dfrac{5}{10}+\dfrac{6}{10}+\dfrac{7}{10}+\dfrac{8}{10}+\dfrac{9}{10}\)

\(=\left(\dfrac{1}{10}+\dfrac{9}{10}\right)+\left(\dfrac{2}{10}+\dfrac{8}{10}\right)+\left(\dfrac{3}{10}+\dfrac{7}{10}\right)+\left(\dfrac{4}{10}+\dfrac{6}{10}\right)+\dfrac{5}{10}\)

\(=1+1+1+1+\dfrac{5}{10}\)

\(=4+\dfrac{5}{10}\)

\(=\dfrac{45}{10}\)

\(13,25:0,5+13,25:0,25+13,25:0,125+13,25\times6\)

\(=13,25:\dfrac{1}{2}+13,25:\dfrac{1}{4}+13,25:\dfrac{1}{8}+13,25\times6\)

\(=13,25\times2+13,25\times4+13,25\times8+13,25\times6\)

\(=13,25\times\left(2+4+8+6\right)\)

\(=13,25\times20\)

\(=265\)