\(=\frac{3}{20}\left(44-26\right)=\frac{3}{20}\cdot18=\frac{27}{10}\)

Bài làm

      \(-\frac{3}{4}.26\frac{1}{5}+\frac{3}{4}.44\frac{1}{5}\)

\(=\frac{3}{4}.\left(-\frac{131}{5}\right)+\frac{3}{4}.\left(\frac{221}{5}\right)\)

\(=\frac{3}{4}.\left(-\frac{131}{5}+\frac{221}{5}\right)\)

\(=\frac{3}{4}.\frac{90}{5}\)

\(=\frac{3}{2}.18\)

\(=27\)

# Học tốt #

\(-\frac{3}{4}.26\frac{1}{5}+\frac{3}{4}.44\frac{1}{5}\)

= \(\frac{3}{4}.-\frac{131}{5}+\frac{3}{4}.\frac{221}{5}\)

= \(\frac{3}{4}.\left(-\frac{131}{5}+\frac{221}{5}\right)\)

= \(\frac{3}{4}.\frac{90}{5}\)

= \(\frac{27}{2}\)

Chúc bạn học tốt !!!

=  -27/2 nha bn

học tốt

\(\frac{3}{4}\cdot26\frac{1}{5}-\frac{3}{4}\cdot44\frac{1}{5}\)

\(=\frac{3}{4}\cdot\frac{131}{5}-\frac{3}{4}\cdot\frac{221}{5}\)

\(=\frac{3}{4}\cdot\left(\frac{131}{5}-\frac{221}{5}\right)\)

\(=\frac{3}{4}\cdot\left(-18\right)\)

\(=-\frac{27}{2}\)

\(\frac{3}{4}.26\frac{1}{5}-\frac{3}{4}44\frac{1}{5}\)

= \(\frac{3}{4}\left(26\frac{1}{5}-44\frac{1}{5}\right)\)

= \(\frac{3}{4}\left(26+\frac{1}{5}-44-\frac{1}{5}\right)\)

=\(\frac{3}{4}.\left(-18\right)\)

=-13,5

Ta có: 3/4. 26/1/5 - 3/4.44/1/5

= 3/4.(26/1/5-44/1/5)

= 3/4.(26-44)

= 3/4. (-18)

= -27/2

Tất cả đều trừ 1 vào mỗi thừa số=>tử số là:x-29(cái cuối+3)

=> cả cái đó=0

=> x-29=0 

=>x=29

\(\frac{x-2}{27}+\frac{x-3}{26}+\frac{x-4}{25}+\frac{x-5}{24}+\frac{x-44}{5}=1\)

\(\Rightarrow\left(\frac{x-2}{27}-1\right)+\left(\frac{x-3}{26}-1\right)+\left(\frac{x-4}{25}-1\right)+\left(\frac{x-5}{24}-1\right)+\left(\frac{x-44}{5}+3\right)=0\)

\(\Rightarrow\frac{x-29}{27}+\frac{x-29}{26}+\frac{x-29}{25}+\frac{x-29}{24}+\frac{x-29}{5}=0\)

\(\Rightarrow\left(x-29\right)\left(\frac{1}{27}+\frac{1}{26}+\frac{1}{25}+\frac{1}{24}+\frac{1}{5}\right)=0\)

\(\Rightarrow x-29=0\)

\(\Rightarrow x=29\)

\(\left(\frac{3}{7}-\frac{5}{2}-\frac{3}{5}\right)-\left(-\frac{4}{7}-\frac{3}{2}+\frac{2}{5}\right)=\frac{3}{7}-\frac{5}{2}-\frac{3}{5}+\frac{4}{7}+\frac{3}{2}-\frac{2}{5}\)

                                                                                  \(=\left(\frac{3}{7}+\frac{4}{7}\right)+\left(-\frac{5}{2}+\frac{3}{2}\right)+\left(-\frac{3}{5}-\frac{2}{5}\right)\)

                                                                                  \(=1+\left(-1\right)+\left(-1\right)\)

                                                                                  \(=-1\)

Hok tốt nha^^

  3 / 2 / 5 + 4 / 3 / 7 - 1 / 4 + 44 / 77 - 2 / 2 / 5 - 0,75

= 17 / 5 + 31 / 7 - 1 / 4 + 4 / 7 - 12 / 5 - 3 / 4

=  ( 17 / 5 - 12 / 5 ) + ( 31 / 7 - 4 / 7 ) + ( 1 / 4 + 3 / 4 )

= 1 + 9 + 1

= 11

31/7 nha.

~học tốt~

k mình nha.

 Bài làm

=17/5 + 31/7 - 1/4 +4/7 - 12/5 - 3/10

=( 17/5+12/5)-(31/7+4/7)-3/10

=29/5-5/1-3/10

=29/5-3/10-5/1

=61/10

Mình ko chác đâu nhé!

\(\frac{x-2}{27}\)+\(\frac{x-3}{26}\)+\(\frac{x-4}{25}\)+\(\frac{x-44}{5}\)=1

<=> \(\frac{x-2}{27}-1\)+\(\frac{x-3}{26}-1\)+\(\frac{x-4}{25}-1\)+\(\frac{x-44}{5}+3\)=1

<=> \(\frac{x-29}{27}\)+\(\frac{x-29}{26}\)+\(\frac{x-29}{25}\)+\(\frac{x-29}{5}\)=1

<=> ( x- 29 ) \(\left(\frac{1}{27}+\frac{1}{26}+\frac{1}{25}+\frac{1}{5}\right)\)=1

phần sau tự làm tp nhé!

pt \(\Leftrightarrow\left(\frac{x-2}{27}-1\right)+\left(\frac{x-3}{26}-1\right)+\left(\frac{x-4}{25}-1\right)+\left(\frac{x-5}{24}-1\right)+\left(\frac{x-44}{5}+3\right)=0\)

\(\Leftrightarrow\frac{x-29}{27}+\frac{x-29}{26}+\frac{x-29}{25}+\frac{x-29}{24}+\frac{x-29}{5}=0\)

\(\Leftrightarrow\left(x-29\right)\left(\frac{1}{27}+\frac{1}{26}+\frac{1}{25}+\frac{1}{24}+\frac{1}{5}\right)=0\)

Mà \(\frac{1}{27}+\frac{1}{26}+\frac{1}{25}+\frac{1}{24}+\frac{1}{5}\ne0\)

\(\Rightarrow x-29=0\Leftrightarrow x=29\)