hỏi google phay

Hỏi gg đi khó lắm

Xin lỗi  vì ko giúp cho bạn vì khó lắm

a) \(\frac{3}{2}-\frac{5}{6}:x=\frac{5}{15}-\frac{3}{15}\)

\(\Leftrightarrow\frac{3}{2}-\frac{5}{6}:x=\frac{2}{15}\)

\(\Leftrightarrow\frac{5}{6}:x=\frac{3}{2}-\frac{2}{15}\)

\(\Leftrightarrow\frac{5}{6}:x=\frac{41}{30}\)

\(\Leftrightarrow x=\frac{5}{6}:\frac{41}{30}\)

\(\Leftrightarrow x=\frac{25}{41}\)

b) \(x-\frac{6}{7}.\frac{14}{8}=\frac{1}{2}-\frac{2}{5}\)

\(\Leftrightarrow x-\frac{3}{2}=\frac{1}{10}\)

\(\Leftrightarrow x=\frac{1}{10}+\frac{3}{2}\)

\(\Leftrightarrow x=\frac{8}{5}\)

c) \(x:\frac{6}{5}+\frac{2}{3}=\frac{7}{3}\)

\(\Leftrightarrow x:\frac{6}{5}=\frac{7}{3}-\frac{2}{3}\)

\(\Leftrightarrow x:\frac{6}{5}=\frac{5}{3}\)

\(\Leftrightarrow x=\frac{5}{3}.\frac{6}{5}\)

\(\Leftrightarrow x=2\)

huyền ngốc

\(\trac{3}{2}

câu 1 x=-3 hoặc 3

x=2 hoặc -2

x thuộc rỗng

x thuộc rỗng

a) \(\frac{11}{6}.\frac{x-1}{5}=2\)

\(\Rightarrow\frac{x-1}{2}=\frac{12}{11}\)

\(\Rightarrow11.\left(x-1\right)=12.2\)

\(\Rightarrow11x-11=24\)

\(\Rightarrow11x=35\)

\(\Rightarrow x=\frac{35}{11}\)

Vậy x = 35/11

b) \(x:\frac{5}{7}.\frac{4}{9}=\frac{2}{3}\)

\(\Rightarrow x:\frac{5}{7}=\frac{3}{2}\)

\(\Rightarrow x=\frac{3}{2}.\frac{5}{7}\)

\(\Rightarrow x=\frac{15}{14}\)

Vậy x = 15/14

P/s: Dấu "." là dấu nhân

đang còn làm tiếp đi nhé

1,

\(\frac{25}{12}+\left(\frac{-4}{12}\right)=\frac{7}{4}\)

\(\frac{-10}{8}+\frac{15}{4}=\frac{5}{2}\)

\(\frac{3}{8}+\frac{-14}{6}=\frac{-47}{24}\)

\(\frac{350}{150}+\left(\frac{-200}{360}\right)=\frac{16}{9}\)

\([\frac{5}{8}+\left(\frac{-3}{4}\right)]+\frac{15}{6}=\frac{-1}{8}+\frac{15}{6}=\frac{19}{8}\)

\(\frac{7}{3}+[\left(\frac{-5}{6}\right)+\left(\frac{-2}{3}\right)]=\frac{7}{3}+\left(\frac{-3}{2}\right)=\frac{5}{6}\)

4,

\(\frac{X+1}{5}=\frac{3}{7}\)

\(\Rightarrow\left(X-1\right).7=3.5\)

\(\Rightarrow7X-7=15\)

\(\Rightarrow7X=22\)

\(\Rightarrow X=\frac{22}{7}\)

\(\frac{X-3}{4}=\frac{1}{2}\)

\(\Rightarrow\left(X-3\right)2=1.4\)

\(\Rightarrow2X-6=4\)

\(\Rightarrow2X=10\)

\(\Rightarrow X=5\)

Tôi ko bt

mình câng gấp ạ

đề khó hiểu quá, bạn ghi lại đi

\(x-\dfrac{3}{4}=\dfrac{1}{7}\\ \Rightarrow x=\dfrac{25}{28}\)

\(\left(-x+\dfrac{3}{5}\right)+\dfrac{13}{20}=\dfrac{5}{6}\\ \Leftrightarrow\left(-x+\dfrac{3}{5}\right)=\dfrac{11}{60}\\ \Leftrightarrow-x=\dfrac{11}{60}-\dfrac{3}{5}\\ \Rightarrow-x=-\dfrac{5}{12}\\ \Rightarrow x=\dfrac{5}{12}\)

\(A.1234:2=617\)

\(B.1632:4=408\)

\(C.2406:6=401\)

\(D.9386:6=1564\left(dư2\right)\)

_HT_

TL

dài lắm

lấy máy mà tính nhaaaaaaaa

HT

Nhớ tíc

gmail.online 

S=1-2+3-4+5-6+............+995-996+997-998

S=(1-2)+(3-4)+(5-6)+.......+(995-996)+(997-998)

S=(-1)+(-1)+(-1)+.........+(-1)+(-1){Có 499 số (-1)}

S=(-1).499

S=-499

mình sẽ trả lời bằng 1 câu hỏi khác có số tổng cộng ?