3 * ( x - 1/6 ) - 2 *( x - 1/3) = 2/3
tìm x
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= 3/4 + 1/3 = 13/12
5/4 x X = 5/8
X = 5/8 : 5/4
X = 1/2
vậy X = ...
Ta có : \(\dfrac{x}{2}=\dfrac{1-x}{3}\)
\(\Leftrightarrow3x=2\left(1-x\right)\)
\(\Leftrightarrow3x=2-2x\)
\(\Leftrightarrow5x=2\)
\(\Leftrightarrow x=\dfrac{5}{2}\)
Vậy ...
Ta có: \(\dfrac{x}{2}=\dfrac{1-x}{3}\)
\(\Leftrightarrow3x=2\left(1-x\right)\)
\(\Leftrightarrow3x=2-2x\)
\(\Leftrightarrow3x+2x=2\)
\(\Leftrightarrow5x=2\)
hay \(x=\dfrac{2}{5}\)
Vậy: \(x=\dfrac{2}{5}\)
30% . x - x - \(\dfrac{5}{6}\) = \(\dfrac{1}{3}\)
\(\Rightarrow\) (\(\dfrac{3}{10}\) - 1) . x = \(\dfrac{1}{3}+\dfrac{5}{6}\)
\(\Rightarrow\) \(-\dfrac{7}{10}\) . x = \(\dfrac{7}{6}\)
\(\Rightarrow\) x = \(-\dfrac{3}{5}\)
KO ghi đề nhé
\(\dfrac{3}{10}.x-x=\dfrac{1}{3}+\dfrac{5}{6}\)
\(x\left(\dfrac{3}{10}-1\right)=\dfrac{2}{6}+\dfrac{5}{6}\)
\(x.\dfrac{-7}{10}=\dfrac{7}{6}\)
\(x=\dfrac{7}{10}:\dfrac{-7}{6}\)
\(x=\dfrac{7}{10}.\dfrac{6}{-7}\)
\(x=\dfrac{42}{-70}\)
\(x=\dfrac{6}{-10}\)
\(x=\dfrac{3}{-5}\)
Vậy \(x=\dfrac{3}{-5}\)
\(\Leftrightarrow2.5:x=2+\dfrac{2}{3}-2-\dfrac{1}{5}=\dfrac{7}{15}\)
hay \(x=\dfrac{5}{2}:\dfrac{7}{15}=\dfrac{5}{2}\cdot\dfrac{15}{7}=\dfrac{75}{14}\)
a)\(f\left(1\right)=2.1^2+5.1-3=2+5-3=4\)
\(f\left(0\right)=0+0-3=-3\)
\(f\left(1,5\right)=2.\left(1,5\right)^2-5.1,5-3=4,5-7,5-3=-6\)
f(x)=0 \(\Leftrightarrow\) 2x+a2-3=0 \(\Rightarrow\) x=\(\dfrac{3-a^2}{2}\).
a) x=1 \(\Leftrightarrow\) \(\dfrac{3-a^2}{2}\)=1 \(\Rightarrow\) a=\(\pm\)1.
b) x=\(\dfrac{-1}{2}\) \(\Leftrightarrow\) \(\dfrac{3-a^2}{2}\)=\(\dfrac{-1}{2}\) \(\Rightarrow\) a=\(\pm\)2.
\(3\times\left(x-\frac{1}{6}\right)-2\times\left(x-\frac{1}{3}\right)=\frac{2}{3}\)
\(3\times x-3\times\frac{1}{6}-2\times x+2\times\frac{1}{3}=\frac{2}{3}\)
\(3\times x-\frac{1}{2}-2\times x+\frac{2}{3}=\frac{2}{3}\)
\(3\times x-2\times x=\frac{2}{3}+\frac{1}{2}-\frac{2}{3}\)
\(x=\frac{4}{6}+\frac{3}{6}-\frac{4}{6}\)
\(x=\frac{3}{6}\)
\(x=\frac{1}{2}\).
cảm ơn love my self