bài này có 5 câu các bn giải giúp m nha.
à quên các bn giải giúp m trước ngày 13.
Trả lời
a)x.3/-2=-5/3
x =(-5/3):(-3/2)
x =10/9.
b)-3/5.x=7/3
x=7/3:(-3/5)
x=-35/9.
c)3/2.x-5=7/3
3/2.x =7/3+5
3/2.x =22/3
x =22/3:3/2
x =11
\(a)x.\frac{3}{-2}=-\frac{5}{3}\)
\(\Leftrightarrow x=\frac{-5}{3}:\frac{3}{-2}\)
\(\Leftrightarrow x=\frac{-5}{3}.\frac{-2}{3}=\frac{10}{9}\)
\(b)-\frac{3}{5}.x=\frac{7}{3}\)
\(\Leftrightarrow x=\frac{7}{3}:\left(-\frac{3}{5}\right)=\frac{7}{3}.-\frac{5}{3}=-\frac{35}{9}\)
\(c)\frac{3}{2}.x-5=\frac{7}{3}\)
\(\Leftrightarrow\frac{3}{2}.x=\frac{7}{3}+5\)
\(\Leftrightarrow\frac{3}{2}.x=\frac{22}{3}\)
\(\Leftrightarrow x=\frac{22}{3}:\frac{3}{2}=\frac{44}{9}\)
\(d)\frac{4}{5}.\frac{10}{-3}+\frac{3}{2}x=\frac{4}{3}:-2\)
\(\Leftrightarrow-\frac{8}{3}+\frac{3}{2}x=-\frac{2}{3}\)
\(\Leftrightarrow\frac{3}{2}x=-\frac{2}{3}+\frac{8}{3}\Leftrightarrow\frac{3}{2}x=2\)
\(\Leftrightarrow x=\frac{4}{3}\)
\(e)\frac{1}{2}x-\frac{3}{2}:\left(-4\right)=\frac{4}{5}:\frac{2}{-5}\)
\(\Leftrightarrow\frac{1}{2}x+\frac{3}{8}=-2\)
\(\Leftrightarrow\frac{1}{2}x=-2-\frac{3}{8}\)
\(\Leftrightarrow\frac{1}{2}x=-\frac{19}{8}\Leftrightarrow x=-\frac{19}{4}\)