\(\frac{x+109-9}{3}+\frac{x+125-25}{5}+\frac{x+149-49}{7}+\frac{x+181-81}{9}=0\)
\(\frac{x-96+44}{2}+\frac{x-88+36}{4}+\frac{x-76+24}{6}+\frac{x-60+8}{8}=50\)
tớ tách rồi, còn lại bạn tự làm =))
a. \(\frac{x+109}{3}+\frac{x+125}{5}+\frac{x+149}{7}+\frac{x+181}{9}=24\)24
b. \(\frac{x-96}{2}+\frac{x-88}{4}+\frac{x-76}{6}+\frac{x-60}{8}=14\)
c. \(\frac{155x-24}{51}+\frac{185x-48}{57}+\frac{205x-3}{61}\)= 16
Tìm x, biết:
a) \(\frac{x+5}{5}+\frac{x+5}{7}+\frac{x+5}{9}=\frac{x+5}{11}+\frac{x+5}{13}\)
b)\(\frac{x+2}{100}+\frac{x+3}{99}+\frac{x+4}{98}=\frac{x+5}{97}+\frac{x+6}{96}+\frac{x+7}{95}\)
c) (x+2) - (x+3) >0
d)\(\left(x-5\right)\left(x+\frac{7}{3}\right)\ge0\)
Tìm x biết: \(\frac{x+1}{9}+\frac{x+4}{6}+\frac{x+5}{5}=\frac{x+2}{8}+\frac{x+3}{7}+\frac{x+6}{4}.\)
Tìm x biết
a) x+2x+3x+4x+...+100x=-213
b)\(\frac{1}{2}x-\frac{1}{3}=\frac{1}{4}x-\frac{1}{6}\)
c)3(x-2)+2(x-1)=10
d)\(\frac{x+1}{3}=\frac{x-2}{4}\)
e)\(\frac{x-6}{7}+\frac{x-7}{8}+\frac{x-8}{9}=\frac{x-9}{10}+\frac{x-10}{11}+\frac{x-11}{12}\)
f)\(\frac{x+32}{11}+\frac{x+23}{12}=\frac{x+38}{13}+\frac{x+27}{14}\)
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)\(1+\frac{1}{3}+\frac{1}{6}+\frac{1}{10}+...+\frac{2}{x\left(x+1\right)}=1\frac{2003}{2004}\)
1) Tìm x biết:
a) \(\frac{x}{9}=\frac{13}{16}\) ;b) \(\frac{17}{x}=\frac{51}{57}\) ; c) \(\frac{x+2}{3}=\frac{4}{9}\) ; d) \(\frac{x+1}{5}=\frac{125}{\left(x+1\right)^2}\)
2) Lập tất cả các tỉ lệ thức từ bốn số sau:
a) 2 ; 7 ; 4 ; 14
b) 4 ; 6 ; 8 ; 12
3) Tìm x ,y ,z biết:
a) \(\frac{x}{7}=\frac{y}{13}\)và x + y = 40
b) \(\frac{x}{y}=\frac{17}{3}\)và x + y = - 60
c) \(\frac{x}{19}=\frac{y}{21}\)và 2x - y = 34
d) 4x = 3y; 5y = 3z và 2x - y -z = - 42
e) \(\frac{x}{4}=\frac{y}{7}\)và x.y = 112
f) 7x = 9y và 10x - 8y = 68
NGƯỜI ĐẦU TIÊN LÀM ĐC MK SẼ TICK
Tìm x biết :
\(\frac{x+3}{10}+\frac{x+4}{9}=\frac{x+5}{8}+\frac{x+6}{7}\)
B1.Tìm x
a) \(-x-\frac{3}{5}=\frac{7}{3}\)
b) \(\frac{4}{9}-x=\frac{-5}{3}\)
c) \(\frac{-9}{5}-\frac{6}{7}.x=\frac{2}{3}\)
d) \(\frac{3}{5}-\left(x-\frac{3}{5}\right)=\frac{4}{8}\)
e) \(\frac{-3}{8}-\left(\frac{4}{9}-x\right)=\frac{-2}{3}\)
Tìm các số x,y,z biết rằng
\(\frac{x-2}{x-1}=\frac{x+4}{x+7}\)
\(\frac{10}{x-5}=\frac{6}{y-9}=\frac{14}{z-21}\) và xyz= 6720
\(\frac{2x-3}{2x-5}=\frac{2x+5}{2x+8}\)
\(\frac{x+16}{9}=\frac{y-25}{16}=\frac{z+9}{25}\) và \(2x^3-1=15\)
