tìm x trong các tỉ lệ thức sau
\(\left(a\right)3,8:\left(2x\right)=\frac{1}{4}:2\frac{2}{3}\)
\(\left(b\right)\left(0,25x\right):3=\frac{5}{6};0,125\)
\(\left(c\right)0,01:2,5=\left(0,75x\right):0,75\)
\(\left(d\right)1\frac{1}{3}:0,8=\frac{2}{3}:\left(0,1x\right)\)
giải chi tiết nhé aj giải thật chi tiết mk tick cho
a) Lm r nkoa!
b) \(\left(0,25x\right):3=\frac{5}{6}:0,125\)
\(=\left(0,25x\right):3=\frac{20}{3}\)
\(\Rightarrow0,25x=\frac{20}{3}\cdot3=20\)
\(\Rightarrow x=20:0,25=80\)
\(\Rightarrow x=80\)
c) \(0,01:2,5=\left(0,75x\right):0,75\)
\(=\frac{1}{250}=\left(0,75x\right):0,75\)
\(\Rightarrow0,75x=\frac{1}{250}\cdot0,75=\frac{3}{1000}\)
\(\Rightarrow x=\frac{3}{1000}:0,75=\frac{1}{250}\)
\(\Rightarrow x=\frac{1}{250}\)
d) \(1\frac{1}{3}:0,8=\frac{2}{3}:\left(0,1x\right)\)
\(=\frac{5}{3}=\frac{2}{3}:\left(0,1x\right)\)
\(\Rightarrow0,1x=\frac{2}{3}:\frac{5}{3}=\frac{2}{5}\)
\(\Rightarrow x=\frac{2}{5}:0,1=4\)
\(\Rightarrow4\)
