\(\dfrac{-7}{x}=\dfrac{-21}{x}-34\)
\(\Rightarrow\dfrac{-7}{x}+\dfrac{21}{x}=-34\)
\(\Rightarrow\dfrac{14}{x}=-34\Rightarrow-34x=14\Rightarrow x=\dfrac{-7}{17}\)
\(\dfrac{-7}{x}=\dfrac{-21}{x}-34\)
\(\Rightarrow\dfrac{-7}{x}+\dfrac{21}{x}=-34\)
\(\Rightarrow\dfrac{14}{x}=-34\Rightarrow-34x=14\Rightarrow x=\dfrac{-7}{17}\)
X/2018-1/70-1/15-1/21-...-1/120=5/8
(11/12+11/12.23+11/23.34+....+2/89.100)+x=5/3
(2'11.13+2/13.15+...+2/19.21)-x+4+221/231=7/3
Tìm \(x\), biết :
a) \(x-\dfrac{1}{4}=\dfrac{5}{8}.\dfrac{2}{3}\)
b) \(\dfrac{x}{126}=\dfrac{-5}{9}.\dfrac{4}{7}\)
\(A.\dfrac{-15}{28}x\dfrac{7}{25}\\ B.\dfrac{-5}{14}x\dfrac{7}{-3}\\ C.\dfrac{-1}{5}-\dfrac{7}{15}x\dfrac{9}{35}\\ D.\dfrac{-3}{4}-(\dfrac{-1}{2})^2\\ E.\dfrac{-4}{5}-\dfrac{-4}{5}x\dfrac{15}{16}\\F.(\dfrac{3}{4}+\dfrac{-7}{2})x(\dfrac{2}{11}+\dfrac{12}{22})\)
7 x 10
--- < --- < ---- (x là số nguyên dương)
x 4 x
Giaỉ dùm mình với
-15/12 . x+ 3/7=6/5 .x -1/2
Tìm x biết
a)\(\dfrac{11}{12}\).x + \(\dfrac{3}{4}\)= -\(\dfrac{1}{6}\)
b)3-\(\left(\dfrac{1}{6}-x\right)\).\(\dfrac{2}{3}\)=\(\dfrac{2}{3}\)
Bài 1 Tìm số nguyên x biếtrằng tổng của ba số x, -1 và 9 bằng 23
x phần 126 = -5 phần 9 nhân 4 phần 7
-5/8 x -12/29 x 8/-10 x 5,8