Tìm x biết :
\(\dfrac{x+5}{-12}\) = \(\dfrac{-12}{x+5}\)
=> (x+5) . (x+5) = (-12) . (-12)
=> x + 5 = 12 hoặc x + 5 = -12
*Nếu x +5 = 12 => x = 7
*Nếu x + = -12 => x = -17
Vậy x = 7 hoặc x= -17
Help me
\(\dfrac{x+3}{5}-\dfrac{1}{y-1}=\dfrac{2}{5}\)
\(-1-\dfrac{7}{14}\le\dfrac{x}{3}\le1+\dfrac{12}{48}\)
\(\dfrac{2y+7}{y-2}\in Z\)
Tìm x biết
\(\dfrac{x-1}{12}+\dfrac{x-1}{20}+\dfrac{x-1}{30}+\dfrac{x-1}{42}+\dfrac{x-1}{56}+\dfrac{x-1}{72}=\dfrac{16}{9}\)
Help me!! Mk đang cần gấp
Tìm x biết rằng:
\(\dfrac{-5}{6}-x=\dfrac{7}{12}+\dfrac{-2}{3}\)
b) Tìm tập hợp các số của x biết rằng:
\(\dfrac{-7}{15}+\dfrac{4}{30}+\dfrac{12}{45}< _-\dfrac{x}{15} < _-\dfrac{3}{5}+ \dfrac{4}{15}+\dfrac{-2}{5}\)
\(\dfrac{2+\dfrac{x}{5}}{5}\)=\(\dfrac{x-\dfrac{1}{5}}{12}\)
Tìm x biết
tìm x biết
a, \(\dfrac{5}{6}\) - x = \(\dfrac{3}{12}\)
b,\(\dfrac{12}{7}\) : x + \(\dfrac{9}{10}\)= \(\dfrac{7}{5}\)
a) |x+5|+3=7
b)25-|x|=10
Can you help me?Fast nhé
Thank you very much
Bài 1: Tính ( hợp lý nếu có thể)
A=\(\dfrac{-3}{8}\)+\(\dfrac{12}{25}\)+\(\dfrac{5}{-8}\)+\(\dfrac{2}{-5}\)+\(\dfrac{13}{25}\)
B=\(\dfrac{-3}{15}\)+(\(\dfrac{2}{3}\)+\(\dfrac{3}{15}\))
C=\(\dfrac{-5}{21}\)+(\(\dfrac{-16}{21}\)+1)
D=(\(\dfrac{-1}{6}\)+\(\dfrac{5}{-12}\))+\(\dfrac{7}{12}\)
E=\(\dfrac{1}{3}\)x\(\dfrac{4}{5}\)+\(\dfrac{1}{3}\)x\(\dfrac{6}{5}\)+\(\dfrac{2}{3}\)
F=\(\dfrac{-5}{6}\)x\(\dfrac{4}{19}\)+\(\dfrac{-7}{12}\)x\(\dfrac{4}{12}\)-\(\dfrac{40}{47}\)
Bài 2: Tìm x,biết:
a) x + \(\dfrac{2}{3}\) = \(\dfrac{4}{5}\)
b) x - \(\dfrac{2}{3}\) = \(\dfrac{7}{21}\)
c) -x - \(\dfrac{3}{4}\) =\(\dfrac{-8}{11}\)
d) \(\dfrac{11}{12}\) - (\(\dfrac{2}{5}\) + x) = \(\dfrac{2}{3}\)
A=\(\dfrac{1}{2}+\dfrac{1}{6}+\dfrac{1}{12}+...+\dfrac{1}{9702}+\dfrac{1}{9900}\)
HELP ME
Thực hiện phép tính
\(B=(\dfrac{1}{3}-0,25-\dfrac{1}{12}).(4\dfrac{5}{7}-121\%+191)\)
Tìm x
\(x+30\%=-1,3\)
\(0,5x-\dfrac{2}{3}x=\dfrac{7}{12}\)
\(\dfrac{x}{5}=\dfrac{x+6}{15}\)
