\(\dfrac{-3}{5}\) . x = \(\dfrac{21}{10}\)
X = \(\dfrac{21}{10}\) : \(\dfrac{-3}{5}\)
X = \(\dfrac{-7}{2}\)
\(\dfrac{-3}{5}.x=\dfrac{21}{10}\)
\(x\) \(=\dfrac{21}{10}.\dfrac{-5}{3}\)
\(x\) \(=\dfrac{-7}{2}\)
\(\dfrac{-3}{5}\) . x = \(\dfrac{21}{10}\)
X = \(\dfrac{21}{10}\) : \(\dfrac{-3}{5}\)
X = \(\dfrac{-7}{2}\)
\(\dfrac{-3}{5}.x=\dfrac{21}{10}\)
\(x\) \(=\dfrac{21}{10}.\dfrac{-5}{3}\)
\(x\) \(=\dfrac{-7}{2}\)
Chọn câu trả lời đúng \(\left(2x+\dfrac{1}{5}\right)\left(-\dfrac{3}{5}x+\dfrac{4}{7}\right)=0\) thì:
A. x = \(\dfrac{-1}{10}\) hoặc x = \(\dfrac{20}{21}\)
B. x = \(\dfrac{20}{21}\)
C. x = \(-\dfrac{1}{10}\)
D. x = \(-\dfrac{20}{21}\)
help me
-4/7-x=3/5-2x
3/7.x-2/3.x=10/21
\(b) 5^{x+4} - 3 . 5^{x+3} = 2. 5^{11} \)
\(c) 2 . 3^{x+2} + 4 . 3^{x+1} = 10 . 3 ^{6}\)
\(d) 6 . 8 ^ {x-1} + 8 ^ {x+1} = 6 . 8^ {19} + 8 ^ {21}\)
a/ \(\dfrac{-3}{5}\) - x = \(\dfrac{21}{10}\)
b/ x : \(\dfrac{2}{9}\) = \(\dfrac{9}{2}\)
c/ \(\dfrac{x}{9}\) = \(\dfrac{5}{3}\)
d/ x : \(\left(\dfrac{2}{5}\right)^3\)= \(\left(\dfrac{5}{2}\right)^3\)
Tìm x, biết:
a) \(\dfrac{3}{7}\)x - \(\dfrac{2}{3}\)x = \(\dfrac{10}{21}\)
b) \(\dfrac{7}{35}\) : (x - \(\dfrac{1}{3}\)) = \(-\dfrac{2}{25}\)
c) 3.(x - \(\dfrac{1}{2}\)) - 5. (x + \(\dfrac{3}{5}\)) = -x + \(\dfrac{1}{5}\)
14/15 : ( 10/7 - 5/21 ) : ( 11/2 x 121/12 + 5/6 - 1/3 ==
Tìm x biết:
a)3/10=-3/15
b)x+2/14=3/21
c)x+2/7=1/2
d)12/15=x-5/10
\(-\frac{3}{5}.x=\frac{21}{10}\)
1; (x - 3/5) : -1/3 = 2/5
2; 3/7 x - 2/3 x = 10/21
Ai giúp mk vs ạ mk cần gấp lắm mơn