giải chi tiết hay chỉ nói kết quả thôi Trang Thư ?
nếu trả lời thì nhắn tin cho mik nha
Trương Hoàng My giải chi tiết dùm mik nha, mik đang nhức đầu đây
Bạn biết làm ko
\(\frac{1}{2}x+\frac{2}{5}\left(\frac{5}{2}-5x\right)=\frac{9}{4}\)
\(\frac{1}{2}x+1-2x=\frac{9}{4}\)
\(\frac{1}{2}x-2x=\frac{9}{4}-1\)
\(\left(\frac{1}{2}-2\right)x=\frac{5}{4}\)
\(-\frac{3}{2}x=\frac{5}{4}\)
\(x=\frac{5}{4}:\left(-\frac{3}{2}\right)\)
\(x=-\frac{5}{6}\)
\(\frac{1}{2}\)x +\(\frac{2}{5}\)(\(\frac{5}{2}\)-5x)=\(\frac{9}{4}\)
\(\frac{1}{2}\)x +\(\frac{2}{5}\).\(\frac{5}{2}\)-\(\frac{2}{5}\).5x=\(\frac{9}{4}\)
\(\frac{1}{2}\)x +1-\(\frac{10}{5}\)x=\(\frac{9}{4}\)
\(\frac{1}{2}\)x +1-2x=\(\frac{9}{4}\)
\(\frac{1}{2}\)x-2x+1=\(\frac{9}{4}\)
x.(\(\frac{1}{2}\)-2)+1=\(\frac{9}{4}\)
x.(\(\frac{1}{2}\)-\(\frac{4}{2}\))+1=\(\frac{9}{4}\)
x.\(\frac{-3}{2}\)+1=\(\frac{9}{4}\)
x.\(\frac{-3}{2}\)=\(\frac{9}{4}\)-1
x.\(\frac{-3}{2}\)=\(\frac{9}{4}\)-\(\frac{4}{4}\)
x.\(\frac{-3}{2}\)=\(\frac{5}{4}\)
x=\(\frac{5}{4}\):\(\frac{-3}{2}\)
x=\(\frac{5}{4}\).\(\frac{2}{-3}\)
x=\(\frac{10}{-12}\)
x=\(\frac{-10}{12}\)
x=\(\frac{-5}{6}\)
chúc bạn học giỏi ^-^