a) \(\dfrac{x}{27}=\dfrac{-2}{3,6}\)
=> x. 3,6 = 27. (-2)
=> x.3,6 = -54
x = (-54) : 3,6
x = -15
b) -0,52 : x = -9,36 : 16,38
- 0,52 : x = \(\dfrac{-4}{7}\)
x = \(\dfrac{-4}{7}\) . ( -0,52)
x = \(\dfrac{52}{175}\)
Lời giải:
a)
b)
-0,52 : x = -9,36: 16,38 => -0,52 . 16,38 = x. (-9,36) => x = -8,5176: ( -9,36) => x = 0,91
c)
a)\(\dfrac{x}{27}=\dfrac{-2}{3,6}\)
=>x.3,6=27.(-2)
=>x . 3,6=-54
=>x=-54:3.6
=>x=-54:\(\dfrac{18}{5}\)
=>x=-54.\(\dfrac{5}{18}\)
=>x=-15
b)-0,52:x=-9,36:16,38
-\(\dfrac{13}{25}:x=-\dfrac{234}{25}:\dfrac{819}{50}\)
\(-\dfrac{13}{25}:x=-\dfrac{4}{7}\)
\(x=-\dfrac{4}{7}:\left(-\dfrac{13}{25}\right)\)
x=\(\dfrac{52}{175}\)
c)\(\dfrac{4\dfrac{1}{4}}{2\dfrac{7}{8}}=\dfrac{x}{1,61}\)
\(\dfrac{\dfrac{17}{4}}{\dfrac{23}{8}}=\dfrac{x}{1,61}\)
\(\dfrac{17}{4}:\dfrac{23}{8}=\dfrac{x}{1,61}\)
\(\dfrac{17}{4}.\dfrac{8}{23}=\dfrac{x}{1,61}\)
\(\dfrac{34}{23}=\dfrac{x}{1,61}\)
=>34.1,61=x.23
rồi bạn tự tính tự làm nốt nhé
a) \(\dfrac{x}{27}=\dfrac{-2}{3,6}\Rightarrow x.3,6=27.\left(-2\right)\)
\(\Rightarrow x.3,6=25\)
\(\Rightarrow x=\left(-54\right):3,6\)
\(\Rightarrow x=-15\)
Vậy x = -15
b) \(-0,52:x=-9,36:16,38\)
\(\Rightarrow\dfrac{-0,52}{x}=\dfrac{-9,36}{16,38}\)
\(\Rightarrow x.-9,36=-0,52.16,38\)
\(x=\dfrac{-0,52.16,38}{-9.36}=0.91\)
Vậy \(x=0,91\)
Bạn vào Vietjack nha! Có tất cả những bài tập mà bạn cần~
b) -0,52 :x =-9,36 : 16,38
=> -0,52 .16,38 = x.(-9,36)
=> x = -8,5176 : (-9,36) = 0,91
=> 34 : 23 = x: 1,61
=> 23x = 34.1,61
=> x = 54,74 : 23 =2,38
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