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0,5x - \(\dfrac{2}{3}\)x = \(\dfrac{5}{12}\)
\(\dfrac{5}{10}\)x - \(\dfrac{2}{3}\)x = \(\dfrac{5}{12}\)
(\(\dfrac{1}{2}\) - \(\dfrac{2}{3}\)) .x=\(\dfrac{5}{12}\)
(\(\dfrac{3}{6}\)
=>(0.5-2/3)x=5/12
=>-1/6x=5/12
=>x=5/12:-1/6
=>=-5/2
vậy x=-5/2
Giải: 1/2x - 2/3x = 5/12
( 1/2 - 2/3 ) x = 5/12
-1/6x = 5/12
x = 5/12 : -1/6
x = -5/2
\(0,5-\frac{2}{3}x=\frac{5}{12}\)
\(=\frac{1}{2}x=\frac{5}{12}+\frac{2}{3}\)
\(=\frac{1}{2}x=\frac{13}{12}\)
\(\Rightarrow x=\frac{13}{12}:\frac{1}{2}\)
\(\Rightarrow x=\frac{6}{13}\)
Vậy x = \(\frac{6}{13}\)
(#)
:3
x. (0,5-2/3)= 5/12
x. -1/6= 5/12
x= 5/12 : -1/6
x= -5/2
\(0,5x-\frac{2}{3}x=\frac{5}{12}\)
\(\frac{1}{2}x-\frac{2}{3}x=\frac{5}{12}\)
\(x.\left(\frac{1}{2}-\frac{2}{3}\right)=\frac{5}{12}\)
\(\Rightarrow x=-\frac{5}{2}\)
\(0,5x-\frac{2}{3}x=\frac{7}{12}\)
\(\Rightarrow x\left(0,5-\frac{2}{3}\right)=\frac{7}{12}\)
\(\Rightarrow-\frac{1}{6}x=\frac{7}{12}\)
\(\Rightarrow x=-\frac{7}{2}=-3,5\)
í mình nhầm:
0,5x - 2/3x = 7/12
= -0,5/3x = 7/12
x = 7/12 : -0,5/3
x= 21/-6 = 7/-2
\(0,5x-\frac{2}{3}x=\frac{5}{12}\)
\(x\left(0.5-\frac{2}{3}\right)=\frac{5}{12}\)
\(x.\left(-\frac{1}{16}\right)=\frac{5}{12}\)
\(x=\frac{5}{12}:-\frac{1}{16}=-2.5\Leftrightarrow-\frac{5}{2}\)
\(0,5x-\frac{2}{3}x=\frac{5}{12}\)
\(\frac{1}{2}x-\frac{2}{3}x=\frac{5}{12}\)
\(\left(\frac{1}{2}-\frac{2}{3}\right)x=\frac{5}{12}\)
\(-\frac{1}{6}x=\frac{5}{12}\)
\(\Rightarrow x=\frac{5}{12}\div\left(-\frac{1}{6}\right)\)
\(x=-\frac{5}{2}\)