9-0-1+2-7 nha haaa
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\left(\frac{2}{3}.y-\frac{4}{9}\right).\left[\frac{1}{2}+\left(-\frac{3}{7}\right):y\right]=0\)
\(\Leftrightarrow\left[\begin{array}{nghiempt}\frac{2}{3}.y-\frac{4}{9}=0\\\frac{1}{2}+\left(-\frac{3}{7}\right):y=0\end{array}\right.\)
\(\Leftrightarrow\left[\begin{array}{nghiempt}x=\frac{2}{3}\\x=\frac{6}{7}\end{array}\right.\)
Vậy x = \(\frac{2}{3};\frac{6}{7}\)
\(\left(\frac{2}{3}y-\frac{4}{9}\right)\left[\frac{1}{2}+\left(-\frac{3}{7}\right):y\right]=0\)
\(\Leftrightarrow\)\(\frac{6y-4}{3}\left(\frac{1}{2}-\frac{3}{7y}\right)=0\)
\(\Leftrightarrow\)\(\left[\begin{array}{nghiempt}\frac{6y-4}{3}=0\\\frac{1}{2}-\frac{3}{7y}=0\end{array}\right.\) \(\Leftrightarrow\left[\begin{array}{nghiempt}6y-4=0\\-\frac{3}{7y}=-\frac{1}{2}\end{array}\right.\)
\(\Leftrightarrow\left[\begin{array}{nghiempt}y=\frac{2}{3}\\7y=6\end{array}\right.\) \(\Leftrightarrow\left[\begin{array}{nghiempt}y=\frac{2}{3}\\y=\frac{6}{7}\end{array}\right.\)
3nha bạn
heeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
cho khó trút đi
9 - 0 - 1+2-7
= 9 - 1 +2 -7
= 8 + 2 - 7
= 10 - 7
= 3