\(-\dfrac{2}{3}x+2=\dfrac{3}{4}\\ -\dfrac{2}{3}x=\dfrac{3}{4}-2\\ -\dfrac{2}{3}x=-\dfrac{5}{4}\\ x=-\dfrac{5}{4}:\left(-\dfrac{2}{3}\right)\\ x=\dfrac{15}{8}\)
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\(\dfrac{2}{5}x+\dfrac{3}{2}=\dfrac{5}{4}\\ \dfrac{2}{3}x=\dfrac{5}{4}-\dfrac{3}{2}=-\dfrac{1}{4}\\ x=-\dfrac{1}{4}:\dfrac{2}{3}\\ x=-\dfrac{3}{8}\)
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\(-2x+\dfrac{3}{14}=\dfrac{1}{7}-\dfrac{4}{21}\\ -2x+\dfrac{3}{14}=-\dfrac{1}{21}\\ -2x=-\dfrac{1}{21}-\dfrac{3}{14}=-\dfrac{11}{42}\\ x=-\dfrac{11}{42}:\left(-2\right)\\ x=\dfrac{11}{84}\)
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\(\dfrac{3}{4}-\dfrac{5}{6}x=\dfrac{4}{3}\\ \dfrac{5}{6}x=\dfrac{3}{4}-\dfrac{4}{3}=-\dfrac{7}{12}\\ x=-\dfrac{7}{12}:\dfrac{5}{6}\\ x=-\dfrac{7}{10}\)
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\(-2\dfrac{1}{3}x-3\dfrac{1}{6}=1-\dfrac{1}{2}\\ -\dfrac{7}{3}x-\dfrac{19}{6}=\dfrac{1}{2}\\ -\dfrac{7}{3}x=\dfrac{1}{2}+\dfrac{19}{6}=\dfrac{11}{3}\\ x=\dfrac{11}{3}:\left(-\dfrac{7}{3}\right)\\ x=-\dfrac{11}{7}\)
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\(-5\dfrac{1}{2}x+1=\dfrac{3}{4}-\dfrac{7}{6}\\ -\dfrac{11}{2}x+1=-\dfrac{5}{12}\\ -\dfrac{11}{2}x=-\dfrac{5}{12}-1=-\dfrac{17}{12}\\ x=-\dfrac{17}{12}:\left(-\dfrac{11}{2}\right)=\dfrac{17}{66}\)
1 lần 1 hàng thôi, nói rồi, nó dài lắm
mà đây là hàng thứ 3 nha, hai hàng trên làm ở trên rồi
\(\dfrac{5}{2}\left(x-\dfrac{3}{5}\right)-\dfrac{1}{10}=x-3\\ \rightarrow\dfrac{5}{2}x-\dfrac{3}{2}-\dfrac{1}{10}=x-3\\ \rightarrow\dfrac{5}{2}x-x=-3+\dfrac{3}{2}+\dfrac{1}{10}\\ \rightarrow\dfrac{3}{2}x=-\dfrac{7}{5}\\ x=-\dfrac{7}{5}:\dfrac{3}{2}\\ x=-\dfrac{14}{15}\)
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\(\dfrac{1}{2}\left(x+2\right)-4\left(x-\dfrac{1}{4}\right)=\dfrac{1}{2}x\\ \rightarrow\dfrac{1}{2}x+1-4x+1=\dfrac{1}{2}x\\ \rightarrow\dfrac{1}{2}x-4x-\dfrac{1}{2}x=-1-1\\ \rightarrow-4x=-2\\ \rightarrow x=\left(-2\right):\left(-4\right)\\ x=\dfrac{1}{2}\)
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\(\dfrac{5}{3}\left(3x-3\right)+\dfrac{1}{2}=\dfrac{1}{2}\left(2x-1\right)\\ \rightarrow5x-5+\dfrac{1}{2}=x-\dfrac{1}{2}\\ \rightarrow5x-x=-\dfrac{1}{2}-\dfrac{1}{2}+5\\ \rightarrow4x=4\\ x=4:4\\ x=1\)
a: =>-2/3x=3/4-2=-5/4
=>x=5/4:2/3=5/4x3/2=15/8
b:=>2/3x=5/4-3/2=-1/4
=>x=-1/4:2/3=-1/4x3/2=-3/8
c: =>-2x+3/14=-1/21
=>-2x=-1/21-3/14=-2/42-9/42=-11/42
=>x=11/84
