\(a,x=\dfrac{3}{8}-\dfrac{5}{6}\\ x=\dfrac{17-40}{48}\\ x=-\dfrac{11}{24}\\ b,\dfrac{2}{3}x=\dfrac{5}{6}+\dfrac{1}{2}\\ \dfrac{2}{3}x=\dfrac{4}{3}\\ x=\dfrac{4}{3}:\dfrac{2}{3}\\ x=2\\ c,18+x:2,36=42,3\\ x:2,36=42,3-18\\ x:2,36=24,3\\ x=57,348\)
`a)x+5/6=3/8`
`x=3/8-5/6`
`x=-11/24`
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`b)2/3x-1/2=5/6`
`2/3x=5/6+1/2`
`2/3x=4/3`
`x=4/3:2/3`
`x=2`
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`c)7,5.2,4+x:2,36=42,3`
`18+x:2,36=42,3`
`x:2,36=42,3-18`
`x:2,36=24,3`
`x=24,3.2,36`
`x=57,348`
a, \(x=\dfrac{3}{8}-\dfrac{5}{6}=\dfrac{18-40}{48}=-\dfrac{11}{24}\)
b, \(\dfrac{2}{3}x=\dfrac{5}{6}+\dfrac{1}{2}=\dfrac{8}{6}=\dfrac{4}{3}\Leftrightarrow x=2\)
c, \(18+\dfrac{x}{2,36}=42,3\Leftrightarrow x=\left(42,3-18\right).2,36=57,348\)