\(\frac{x+5}{7}-\frac{x+18}{8}+\frac{x+8}{9}=0\)
\(72\left(x+5\right)-63\left(x+18\right)+56\left(x+8\right)=0\)
\(72x+360-63x-1134+56x+448=0\)
\(65x-326=0\)
\(65x=326\)
\(x=\frac{326}{65}\)
Các câu hỏi tương tự
Tìm x biết
a) (8-5x).(x+2)+4.(x-2).(x+1)+2.(x-2).(x+2)=0
b)\(\left(-\frac{2}{5}+x\right):\frac{7}{9}+\left(-\frac{3}{5}+\frac{5}{6}\right):\frac{7}{9}=0\)
c)\(1+\frac{1}{3}+\frac{1}{6}+\frac{1}{10}+...+\frac{2}{x\left(x+1\right)}=1\frac{2003}{2004}\)
Tìm x,biết
a)\(|x+\frac{1}{3}|=0\)
b)\(|x+\frac{3}{4}=\frac{1}{2}|\)
c)\(|\frac{5}{18}-x|-\frac{7}{24}=0\)
d)\(\frac{2}{5}-|\frac{1}{2}-x|=6\)
e)\(|\frac{3}{8}-x|+\frac{5}{6}=\frac{7}{4}\)
Tìm x biết: \(\frac{x+1}{9}+\frac{x+4}{6}+\frac{x+5}{5}=\frac{x+2}{8}+\frac{x+3}{7}+\frac{x+6}{4}.\)
Cho \(\frac{x-6}{7}+\frac{x-7}{8}+\frac{x-8}{9}=\frac{x-9}{10}+\frac{x-10}{11}+\frac{x-11}{12}\). Tìm x.
Tínhfrac{1}{9}: frac{8}{27}:frac{-1}{3}left(frac{-3}{4}+frac{2}{5}right):frac{3}{7}+left(frac{3}{5}+frac{-1}{4}right):frac{3}{7}frac{7}{8}:left(frac{2}{9}-frac{1}{18}right)+frac{7}{8}:left(frac{1}{36}-frac{5}{12}right)Tìm x thuộc Q bt left(3x+5right).left(2x-4right)0left(x^2-1right).left(x+3right)05x^2-frac{1}{2}x0frac{x}{4}-frac{1}{2}frac{3}{4}frac{1}{8}+frac{7}{8}:xfrac{3}{4}Tính nhanhAfrac{99}{100}-frac{1}{99.100}-frac{1}{98.99}-.....-frac{1}{3.2}-frac{1}{2.1}Giúp mk vs mn ơi
Đọc tiếp
Tính
\(\frac{1}{9}\): \(\frac{8}{27}\):\(\frac{-1}{3}\)
\(\left(\frac{-3}{4}+\frac{2}{5}\right)\):\(\frac{3}{7}\)+\(\left(\frac{3}{5}+\frac{-1}{4}\right)\):\(\frac{3}{7}\)
\(\frac{7}{8}\):\(\left(\frac{2}{9}-\frac{1}{18}\right)+\frac{7}{8}:\left(\frac{1}{36}-\frac{5}{12}\right)\)
Tìm x thuộc Q bt
\(\left(3x+5\right).\left(2x-4\right)=0\)
\(\left(x^2-1\right).\left(x+3\right)=0\)
\(5x^2-\frac{1}{2}x=0\)
\(\frac{x}{4}-\frac{1}{2}=\frac{3}{4}\)
\(\frac{1}{8}+\frac{7}{8}:x=\frac{3}{4}\)
Tính nhanh
\(A=\frac{99}{100}-\frac{1}{99.100}-\frac{1}{98.99}-.....-\frac{1}{3.2}-\frac{1}{2.1}\)
Giúp mk vs mn ơi
Tìm số nguyên xbiết :a,4frac{5}{9}:2frac{5}{18}-7 x left(3frac{1}{5}:3,2+4,5-1frac{31}{45}right):left(-21frac{1}{2}right) b,frac{5-frac{5}{3}+frac{5}{9}}{8+frac{8}{9}-frac{8}{3}}:frac{0,75-frac{3}{7}+0,6}{2,75-frac{11}{7}+2,2} GIÚP MÌNH NHÉ MÌNH CẦN GẤP !!!! THANK YOU ^.^
Đọc tiếp
Tìm số nguyên \(x\)biết :
\(a,\)\(4\frac{5}{9}:2\frac{5}{18}-7< x< \left(3\frac{1}{5}:3,2+4,5-1\frac{31}{45}\right):\left(-21\frac{1}{2}\right)\)
\(b,\frac{5-\frac{5}{3}+\frac{5}{9}}{8+\frac{8}{9}-\frac{8}{3}}:\frac{0,75-\frac{3}{7}+0,6}{2,75-\frac{11}{7}+2,2}\)
GIÚP MÌNH NHÉ MÌNH CẦN GẤP !!!! THANK YOU ^.^
Tìm x biết :
\(\frac{x+3}{10}+\frac{x+4}{9}=\frac{x+5}{8}+\frac{x+6}{7}\)
Tìm x:
\(\frac{x+5}{2015}+\frac{x+6}{2014}+\frac{x+7}{2013}+\frac{x+8}{2012}+\frac{x+9}{2011}=-5\)
\(\frac{2}{\left(x+1\right)\left(x+3\right)}+\frac{5}{\left(x+3\right)+\left(x+8\right)}+\frac{10}{\left(x+8\right)\left(x+18\right)}+\frac{1}{x+18}=\frac{5}{6}\)
Tìm x;y;z