a) \(0,25x+175\%x=x+\frac{9}{7}\)

\(0,25x+175\%x+x=\frac{9}{7}\)

\(0,25x+\frac{7}{4}x+x=\frac{9}{7}\)

\(\left(0,25+\frac{7}{4}+1\right)x=\frac{9}{7}\)

\(3x=\frac{9}{7}\)

\(x=\frac{9}{7}\div3\)

\(x=\frac{9}{7}\times\frac{1}{3}\)

\(x=\frac{3}{7}\)

vậy \(x=\frac{3}{7}\)

b)\(2x-\frac{3}{2}-x=1\frac{1}{5}\)

\(2x-x=1\frac{1}{5}+\frac{3}{2}\)

\(x=\frac{27}{10}\)

vậy \(x=\frac{27}{10}\)

a)  \(2\frac{1}{4}x-9\frac{1}{4}=20\)

\(\frac{9}{4}x=20+\frac{37}{4}\)

\(\frac{9}{4}x=\frac{80}{4}+\frac{37}{4}\)

\(\frac{9}{4}x=\frac{117}{4}\)

\(x=\frac{117}{4}:\frac{9}{4}\)

\(x=\frac{117}{4}.\frac{4}{9}\)

\(x=13\)

Vậy x=13

a) \(2\frac{1}{4}x-9\frac{1}{4}=20\)

\(\Rightarrow\frac{9}{4}x-\frac{37}{4}=20\)

\(\Rightarrow\frac{9}{4}x=20+\frac{37}{4}\)

\(\Rightarrow\frac{9}{4}x=\frac{117}{4}\)

\(\Rightarrow x=\frac{117}{4}:\frac{9}{4}\)

\(\Rightarrow x=13\)

Vậy x = 13

b) \(0,25x-\frac{1}{5}x=\frac{13}{20}\)

\(\Rightarrow\left(0,25-\frac{1}{5}\right)x=\frac{13}{20}\)

\(\Rightarrow\frac{1}{20}x=\frac{13}{20}\)

\(\Rightarrow x=\frac{13}{20}:\frac{1}{20}\)

\(\Rightarrow x=13\)

Vậy x = 13

\(b,\)\(0,25x-\frac{1}{5}x=\frac{13}{20}\)

\(\Leftrightarrow x\left(0,25-\frac{1}{5}\right)=\frac{13}{20}\)

\(\Rightarrow x.\frac{1}{20}=\frac{13}{20}\)

\(\Rightarrow x=\frac{13}{20}:\frac{1}{20}\)

\(x=13\)

a)\(\frac{0,2}{0,25x-3}=\frac{-3}{2}\)

\(\Rightarrow0,25x-3=\frac{2\cdot0,2}{-3}=-\frac{2}{15}\)

\(\Rightarrow0,25x=\frac{-2}{15}+3=\frac{43}{15}\)

\(\Rightarrow x=\frac{43}{15}:0,25=\frac{172}{15}\)

Xậy x = 172/15

b)\(\frac{2,5x+1}{-1,5}=\frac{-2}{1,4}\)

\(\Rightarrow2,5x+1=\frac{-2\cdot\left(-1,5\right)}{1,4}=\frac{15}{7}\)

\(\Rightarrow2,5x=\frac{15}{7}-1=\frac{8}{7}\)

\(\Rightarrow x=\frac{8}{7}:2,5=\frac{16}{35}\)

Vậy x=16/35

cảm ơn bạn nhé

\(a,3,8:2x=\frac{1}{4}:2\frac{2}{3}\)

\(\Leftrightarrow3,8:2x=\frac{3}{32}\)

\(\Leftrightarrow2x=3,8:\frac{3}{32}\)

\(\Leftrightarrow2x=\frac{608}{15}\)

\(\Leftrightarrow x=\frac{304}{15}\)

\(b,0,25x:3=\frac{5}{6}:0,125\)

\(\Leftrightarrow0,25x:3=\frac{20}{3}\)

\(\Leftrightarrow0,25x=20\)

\(\Leftrightarrow x=80\)

\(c,0,01:2,5=0,75x:0,75\)

\(\Leftrightarrow0,75x:0,75=\frac{1}{250}\)

\(\Leftrightarrow x=\frac{1}{250}\)

Mik lm hơi tắt chỗ nào chw hiểu thì hỏi mik nhé

Tìm x trong các tỉ lệ thức sau :

\(\left(a\right)3,8\div\left(2x\right)=\frac{1}{4}\div2\frac{2}{3}\)

\(3,8\div\left(2x\right)=\frac{3}{32}\)

\(2x=3,8\div\frac{3}{32}\)

\(2x=40\frac{8}{15}\)

\(x=20\frac{4}{15}\)

\(\left(0,25x\right)\div3=\frac{5}{6}\div0,125\)

\(\left(0,25x\right)\div3=6\frac{2}{3}\)

\(\left(0,25x\right)=6\frac{2}{5}\times3\)

\(\left(0,25x\right)=20\)

\(x=80\)

\(0,01\div2,5=\left(0,75x\right)\div0,75\)

\(0,004=\left(0,75x\right)\div0,75\)

\(0,75x=0,75\times0,004\)

\(0,75x=0,003\)

\(x=0,004\)

\(1\frac{1}{3}\div0,8=\frac{2}{3}\div\left(0,1x\right)\)

\(1\frac{2}{3}=\frac{2}{3}\div\left(0,1x\right)\)

\(\left(0,1x\right)=\frac{2}{3}\div1\frac{2}{3}\)

\(\left(0,1x\right)=\frac{2}{5}\)

\(x=4\)

Dung ko z

bạn ghi ra đi mk giải cho (kb để mk ns cho dễ hiểu)

a: \(\Leftrightarrow2x=\dfrac{19}{5}:\dfrac{3}{32}=\dfrac{608}{15}\)

hay x=304/15

b: \(\Leftrightarrow0.25x=20\)

hay x=80

c: \(\Leftrightarrow x=\dfrac{1}{100}:\dfrac{5}{2}=\dfrac{2}{500}=\dfrac{1}{250}\)

d: \(\Leftrightarrow0.1x=\dfrac{2}{3}:\dfrac{5}{3}=\dfrac{2}{5}\)

hay \(x=\dfrac{2}{5}:\dfrac{1}{10}=\dfrac{20}{5}=4\)

\(a,7,8:2x=\frac{1}{4}:2\frac{2}{3}\)

\(7,8:2x=\frac{3}{32}\)

\(2x=7,8:\frac{3}{32}\)

\(2x=\frac{416}{5}\)

\(x=\frac{416}{5}:2\)

\(x=\frac{208}{5}\)

\(b,0,25x:3=\frac{5}{6}:0,125\)

\(0,25x:3=\frac{20}{3}\)

\(0,25x=\frac{20}{3}\times3\)

\(0,25x=20\)

\(x=20:0,25\)

\(x=80\)

\(a)\)\(7,8\div\left(2x\right)=\frac{1}{4}\div2\frac{2}{3}\)

\(\Rightarrow\)\(7,8\div\left(2x\right)=\frac{1}{4}\div\frac{8}{3}\)

\(\Rightarrow\)\(\frac{78}{10}\div\left(2x\right)=\frac{1}{4}\times\frac{3}{8}\)

\(\frac{39}{5}\div\left(2x\right)=\frac{3}{32}\)

\(\Rightarrow\)\(\left(2x\right)=\frac{39}{5}\div\frac{3}{32}\)

\(\Rightarrow\)\(\left(2x\right)=\frac{39}{5}\div\frac{3}{32}\)

\(\Rightarrow\)\(\left(2x\right)=\frac{39}{5}\times\frac{32}{3}\)

\(\Rightarrow\)\(2x=\frac{416}{5}\)

\(\Rightarrow\)\(x=\frac{416}{5}\div2\)

\(\Rightarrow\)\(x=\frac{416}{10}\)

\(\Rightarrow\)\(x=\frac{208}{5}\)

\(b)\)\(\left(0,25x\right)\div3=\frac{5}{6}\div0,125\)

\(\Rightarrow\)\(\left(0,25x\right)\div3=\frac{5}{6}\div\frac{1}{8}\)

\(\Rightarrow\)\(\left(0,25x\right)\div3=\frac{5}{6}\times8\)

\(\Rightarrow\)\(\left(0,25x\right)\div3=\frac{20}{3}\)

\(\Rightarrow\)\(\left(0,25x\right)=\frac{20}{3}\times3\)

\(\Rightarrow\)\(\left(0,25x\right)=\frac{20}{3}\times3\)

\(\Rightarrow\)\(0,25x=20\)

\(\Rightarrow\)\(x=80\)