\(=\dfrac{35.85\cdot14}{0.5+2.3}\cdot\dfrac{6}{17}\cdot\dfrac{16.8}{259,2}-\left(4.625-\dfrac{13}{6}:\dfrac{26}{3}\right):\left(3.25:2.25\right)\)

\(=\dfrac{1673}{408}-\dfrac{315}{104}=\dfrac{1421}{1326}\)

Lời giải:

$\frac{4}{9}\times \frac{-13}{-17}+\frac{-2}{17}\times \frac{4}{9}+\frac{2}{9}\times \frac{4}{17}$
$=\frac{4}{9}\times (\frac{13}{17}+\frac{-2}{17})+\frac{2}{9}\times \frac{4}{17}$

$=\frac{4}{9}\times \frac{11}{17}+\frac{4}{9}\times \frac{2}{17}$

$=\frac{4}{9}\times (\frac{11}{17}+\frac{2}{17})$

$=\frac{4}{9}\times \frac{13}{17}=\frac{52}{153}$

\(\frac{2}{9}\cdot\frac{5}{17}+\frac{2}{9}\cdot\frac{12}{17}+\frac{7}{9}\)

\(=\frac{2}{9}\left(\frac{5}{17}+\frac{12}{17}\right)+\frac{7}{9}\)

\(=\frac{2}{9}+\frac{7}{9}\)

\(=1\)

         [ Giải: ]

\(=\frac{2}{9}\cdot\left(\frac{5}{17}+\frac{12}{17}\right)+\frac{7}{9}\)

\(=\frac{2}{9}\cdot\frac{5+12}{17}+\frac{7}{9}\)

\(=\frac{2}{9}\cdot1+\frac{7}{9}\)

\(=\frac{2}{9}+\frac{7}{9}=\frac{2+7}{9}=1\)

2/9 . 5/17 + 2/9 . 12/17 + 7/9

= 2/9 . ( 5/17 + 12/17 ) + 7/9

= 2/9 .          17/17        + 7/9

= 2/9 .              1           + 7/9

=            2/9                  + 7/9

=                         9/9

=                           1

Đề viết thiếu ko vậ?

#)Giải :

     \(\frac{2}{9}.\frac{5}{17}+\frac{2}{9}.\frac{13}{17}-\frac{2}{9}.\frac{1}{17}+2018\frac{7}{9}\)

\(=\frac{2}{9}\left(\frac{5}{17}+\frac{13}{17}-\frac{1}{17}\right)+2018\frac{7}{9}\)

\(=\frac{2}{9}.1+2018\frac{7}{9}\)

\(=\frac{2}{9}+2018\frac{7}{9}\)

\(=2018\frac{9}{9}=2019\)

             #~Will~be~Pens~#

\(\frac{2}{9}\times\frac{5}{17}+\frac{2}{9}\times\frac{13}{17}-\frac{2}{7}\times\frac{1}{17}+2018\frac{7}{9}\)

\(=\frac{2}{9}\times\left(\frac{5}{17}+\frac{13}{17}-\frac{1}{17}\right)+2018\frac{7}{9}\)

\(=\frac{2}{9}\times1+2018\frac{7}{9}\)

\(=\frac{2}{9}+2018\frac{7}{9}\)

\(=\frac{2}{9}+2018+\frac{7}{9}\)

\(=\left(\frac{2}{9}+\frac{7}{9}\right)+2018\)

\(=1+2018=2019\)

~ Hok tốt ~

=-17/15-9/17-2/3+9/17

=-17/15-10/15

=-27/15

=-9/5

Giải:

\(\left(\dfrac{-17}{15}-\dfrac{9}{17}\right)-\left(\dfrac{2}{3}-\dfrac{9}{17}\right)\)

⇔ \(\dfrac{-17}{15}-\dfrac{9}{17}-\dfrac{2}{3}+\dfrac{9}{17}\)

⇔\(\dfrac{-17}{15}-\dfrac{10}{15}\)

\(\Leftrightarrow\dfrac{-27}{15}=\dfrac{-9}{5}\)

=-17/15-9/17-2/3+9/17

=-17/15-10/15

=-27/15

=-9/5

a,-5/9 + 8/18 + -2/11 + 4/-9 + 7/15                                            b,5/17 + -9/15 + -2/17 + 2/5 + 14/17

= -5/9 + 4/9 + -2/+ 4/-9 + 7/15                                                 = 5/17 + -3/5 + -2/17 + 2/5 + 14/17

=(-5/9 + 4/9 + -4/9 ) +-2/11 + 7/15                                            = ( 5/17 + -2/17 + 14/17) + ( 2/5 + -3/5)

= -1/3 + -2/11 + 7/15                                                               =1 + -1/5

=-75/225 + -30/ 225 + 77/225                                                  =4/5              

= -25/225 = -1/9                                                                        ( 4/5 = 0.8 )

\(\frac{32}{17}:\frac{9}{2}+\frac{35}{17}:\frac{9}{3}+\frac{35}{17}:\frac{9}{4}\)

\(=\frac{32}{17}:\left(\frac{9}{2}+\frac{9}{3}+\frac{9}{4}\right)\)

\(=\frac{32}{17}:\frac{39}{4}\)

\(=\frac{128}{663}\)

| x | -9 = -2 +17

| x | -9 = 15

=> x = 24 hoặc x = -24

| x-9 | = -2 +17

| x-9 | = 15

xét | x-9 | = { x-9 nếu x-9 >_/ 0 => x >_/ 9

                  { -(x-9) nếu x-9 < 0 => x < 9

Với x >_/ 9 thì:

x-9 = 15

x    = 15 + 9

x    = 24 ( TM)

Với x < 9 thì :

-(x-9) = 15

-x + 9 = 15

x        = 15-9

x        = 6 (TM)

Vậy x = 24 hoặc x = -6

nhớ tíck cho mk nha ( nếu đúng) . Thanks !!!!!!!!!!!!