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\(0,4.x-\frac{1}{5}.x=\frac{3}{4}\)
<=> \(x.\left(0,4-\frac{1}{5}\right)=\frac{3}{4}\)
<=> \(x.\frac{1}{5}=\frac{3}{4}\)
<=> \(x=\frac{3}{4}:\frac{1}{5}\)
<=> \(x=\frac{15}{4}\)
kết luận : \(x=\frac{15}{4}\)
\(0,4.x-\frac{1}{5}.x=\frac{3}{4}\)
<=>\(x.\left(0,4-\frac{1}{5}\right)=\frac{3}{4}\)
<=>\(x.\frac{1}{5}=\frac{3}{4}\)
<=>\(x=\frac{3}{4}:\frac{1}{5}\)
<=>\(x=\frac{15}{4}\)
vậy \(x=\frac{15}{4}\)
\(0,25x=100:\frac{1}{2}\)
\(0,25x=200\)
\(x=200:0,25\)
\(x=800\)
k cho mình nha
\(0,25x=100:\frac{1}{2}\)
\(\frac{1}{4}.x=100.2\)
\(\frac{1}{4}x=200\)
\(x=200:\frac{1}{4}\)
\(x=200.4\)
\(x=800\)
0,4x-1/5=3/4
0.4x=3/4+1/5
0.4x=19/20
x=19/20:0,4
x=19/8=2,375
k mik nha ^o^
\(0,4x-\frac{1}{5}=\frac{3}{4}\)
\(0,4x=\frac{19}{20}\)
\(x=\frac{19}{8}\)
x-0,25x=0,5
x(1-0,25)=0,5
x.0,75=0,5
x=0,5:0,75
x=\(\frac{2}{3}\)
Vậy x=\(\frac{2}{3}\)
\(a,0.25x\) - \(\frac{2}{3}x\) =\(1\frac{1}{6}\)
\(\Rightarrow x\cdot\left(0.25-\frac{2}{3}\right)=1\frac{1}{6}\)
\(\Rightarrow x\cdot\frac{-5}{12}=\frac{7}{6}\)
\(\Rightarrow x=\frac{7}{6}:\frac{-5}{12}\)
\(\Rightarrow x=\frac{-14}{5}=-2.8\)
(0,4x - 1,3 )2 = 5,29 = (2,3)2
=> 0,4x - 1,3 = 2,3
=> 0,4x = 2,3 +1,3 = =3,6
=> x = \(\frac{3,6}{0,4}=9\)
\(\left(0,4x-1,3\right)^2=5,29\)
\(\left(0,4x-1,3\right)=\sqrt{5,29}\)
\(\left(0,4x-1,3\right)=2,3\)
\(0,4x=2,3+1,3\)
\(0,4x=3,6\)
\(x=3,6:0,4\)
\(x=9\)
60%x + 0,4x + x:3 = 2
\(\frac{3}{5}x+\frac{2}{5}x+\frac{1}{3}x=2\)
\(\left(\frac{3}{5}+\frac{2}{5}+\frac{1}{3}\right)x=2\)
\(\frac{4}{3}x=2\)
\(x=2:\frac{4}{3}\)
\(x=\frac{3}{2}\)
0,25x -0,4x = 1
x(0,25 - 0,4) = 1
-0,15x =1
x = 1 : (-0,15)
x = - 20/3