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` 5/9 . ( -2/13)+5/9.(-7/13)+(-8/13) = 5/9(-2/13-7/13)-8/13=5/9.(-9/13)-8/13=-5/13-8/13=-13/13=-1 `
Mot nghin khong tram ba hai phan hai nghin hai tram sau muoi mot
\(\frac{1}{2}+-\frac{1}{5}+-\frac{5}{7}+\frac{1}{6}-\frac{3}{35}+\frac{1}{3}+\frac{1}{41}=\frac{1}{41}\)
5/8+3/8÷3/11-10
5/8+3/8×11/3-10
5/8+33/24-10
15/24+33/24-10
48/24-10
48/24-10/1
48/24-240/24
-192/24=4/1
3 ( x - 1 ) + \(\frac{1}{2}=\frac{-7}{4}\)
3 ( x - 1 ) = \(\frac{-7}{4}-\frac{1}{2}\)
3 ( x - 1 ) = \(\frac{-9}{4}\)
x - 1 = \(\frac{-9}{4}\div3\)
x - 1 = \(\frac{-3}{4}\)
x = \(\frac{-3}{4}+1\)
x = \(\frac{1}{4}\)
3(x - 1) + \(\frac{1}{2}\) = \(\frac{-7}{4}\)
3(x - 1) = \(\frac{-7}{4}\) - \(\frac{1}{2}\)
3(x - 1) = \(\frac{-9}{4}\)
x - 1 = \(\frac{-9}{4}\) : 3
x - 1 = \(\frac{-3}{4}\)
x = \(\frac{-3}{4}\) + 1
x = \(\frac{1}{4}\)
\(\frac{7}{13}.\frac{5}{9}+\frac{7}{19}.\frac{8}{13}-3.\frac{7}{19}=\)\(\frac{-1288}{2223}\)
là j vậy bạn
\(\dfrac{2}{3}\) x \(x\) + \(\dfrac{1}{3}\) = - \(\dfrac{5}{7}\)
\(\dfrac{2}{3}x\) = - \(\dfrac{5}{7}\) - \(\dfrac{1}{3}\)
\(\dfrac{2}{3}x\) = - \(\dfrac{22}{21}\)
\(x\) = - \(\dfrac{22}{21}\) : \(\dfrac{2}{3}\)
\(x\) = - \(\dfrac{11}{7}\)