25-x phan 18=1phan2
tim x
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AD
1 tháng 4 2021
\(\frac{1}{6}=\frac{x}{18}\Rightarrow x=3\)
\(\frac{x}{8}=-\frac{1}{4}\Rightarrow x=-2\)
\(\frac{4}{-5}=\frac{x}{10}\Rightarrow x=-8\)
\(\frac{11}{5}=-\frac{22}{x}\Rightarrow x=-10\)
\(\frac{x}{8}=\frac{8}{x}\Rightarrow x^2=64\Rightarrow x=8\)
\(\frac{x}{-11}=-\frac{11}{x}\Rightarrow x^2=121\Rightarrow x=11\)
#H
ZS
2
ZS
27 tháng 12 2017
vay x =............................................. vi .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
TN
2
XO
1 tháng 8 2020
Ta có \(\frac{9}{25}x+\frac{3}{5}.\frac{9}{25}x+\frac{3}{5}.18+\frac{9}{25}x+18=x\)
=> \(\frac{9}{25}x\left(1+\frac{3}{5}+1\right)+18\left(\frac{3}{5}+1\right)=x\)
=> \(\frac{117}{125}x+28,8=x\)
=> \(x-\frac{117}{125}x=28,8\)
=> \(\frac{8}{125}x=28,8\)
=> x = 450
Vậy x = 450
1 tháng 8 2020
\(\frac{9}{25}x+\frac{3}{5}.\frac{9}{25}x+\frac{3}{5}.18+\frac{9}{25}x+18=x\)
\(x\left(\frac{9}{25}+\frac{9}{25}+\frac{9}{25}\right).\frac{3}{5}+\frac{3}{5}.18+18=x\)
\(x.\frac{3}{5}\left(\frac{27}{25}+18\right)+18=x\)
\(x.\frac{3}{5}\left(\frac{27}{25}+\frac{450}{25}\right)+18=x\)
\(x.\frac{3}{5}.\frac{477}{25}+18=x\)
\(x.\frac{1431}{125}+\frac{2250}{125}=x\)
\(x.\frac{3681}{125}=x\)
vậy chac tui làm sai rồi
5 tháng 10 2017
\(\left(\frac{x+1}{2}\right)^2=\frac{16}{25}\)
\(\left(\frac{x+1}{2}\right)^2=\frac{4^2}{5^2}\)
\(\left(\frac{x+1}{2}\right)^2=\left(\frac{4}{5}\right)^2\)
\(\Rightarrow\frac{x+1}{2}=\frac{4}{5}\)
\(\Rightarrow\left(x+1\right).5=2.4\)
\(\Rightarrow\left(x+1\right).5=8\)
\(\Rightarrow x+1=\frac{8}{5}\)
\(\Rightarrow x=\frac{3}{5}\)
vay \(x=\frac{3}{5}\)
LM
1
12 tháng 9 2015
6/25=6x4/25x4=24/100
500/1000=500:10/1000:10=50/100
18/200=18:2/200:2=9/100
tick nha
\(\frac{25-x}{18}=\frac{1}{2}\)
\(\frac{25-x}{18}=\frac{9}{18}\)
\(25-x=9\)
\(x=25-9\)
\(x=16\)
\(\frac{25-x}{18}=\frac{1}{2}\)
\(\frac{25-x}{18}=\frac{9}{18}\)
\(\Rightarrow25-x=9\)
\(x=25-9\)
\(x=16\)