\(\Leftrightarrow-\dfrac{43}{5}\cdot\dfrac{90}{43}< =x< =\dfrac{-13}{5}:\dfrac{7}{5}\)
=>-18<=x<=-13/7
mà x là số nguyên
nên \(x\in\left\{-18;-17;...;-2\right\}\)
BT4: Tìm số nguyên x, biết
2) \(-4\dfrac{1}{3}.\left(\dfrac{1}{2}-\dfrac{1}{6}\right)\le x\le-\dfrac{2}{3}\left(\dfrac{1}{3}-\dfrac{1}{2}-\dfrac{3}{4}\right)\)
Câu 2: Tìm số nguyên x, biết rằng:
\(\dfrac{3}{7}.15\dfrac{1}{3}+\dfrac{3}{7}.5\dfrac{2}{5}\le x\le\left(3\dfrac{1}{3}:7-6\dfrac{1}{2}\right).\left(-2\dfrac{1}{3}\right)\)
Tìm x \(\in\) Z biết;
a) \(\dfrac{x}{15}=\dfrac{4}{y}=\dfrac{-2}{5}\)
b) \(\dfrac{x-3}{4}=\dfrac{15}{20}\)
c) \(\dfrac{-5}{9}+\dfrac{-8}{15}+\dfrac{22}{-9}+\dfrac{-7}{15}< x\le\dfrac{-1}{3}+\dfrac{-1}{4}+\dfrac{-5}{12}\)
Tìm số nguyên x:
\(4\dfrac{1}{3}.\left(\dfrac{1}{6}-\dfrac{1}{2}\right)\le x\le\dfrac{2}{3}.\left(\dfrac{1}{3}-\dfrac{1}{2}-\dfrac{3}{4}\right)\)
Tìm x: \(3\dfrac{2}{3}.\left(\dfrac{1}{5}-\dfrac{1}{2}\right)\le x\le\dfrac{3}{11}.\left(\dfrac{1}{5}+\dfrac{1}{3}+\dfrac{1}{2}\right)\)
BT1: Tìm x, biết:
4) \(\dfrac{-8}{13}+\dfrac{-7}{17}+\dfrac{21}{13}\le x\le\dfrac{-9}{14}+3+\dfrac{5}{-14}\)
Tìm x biết :
1/\(\dfrac{4}{3}\) + x = \(\dfrac{2}{15}\) 2/\(\dfrac{1}{3}+\dfrac{1}{2}:\) x = -0,25 3/(\(\dfrac{2x}{5}+2\) ):(-4) = -1\(\dfrac{1}{2}\) 4/ x.( x + 1) = 0 5/3\(\dfrac{1}{2}-\dfrac{1}{2}x\) = \(\dfrac{2}{3}\)
6/1\(\dfrac{1}{2}+x=\dfrac{3}{2}-7\) 7/\(2x-16=40+x\) 8/\(x:\dfrac{5}{3}+\dfrac{1}{3}=\dfrac{-2}{5}\) 9/\(\dfrac{x}{4}=\dfrac{9}{x}\)
Tìm x biết rằng:
\(\dfrac{-5}{6}-x=\dfrac{7}{12}+\dfrac{-2}{3}\)
b) Tìm tập hợp các số của x biết rằng:
\(\dfrac{-7}{15}+\dfrac{4}{30}+\dfrac{12}{45}< _-\dfrac{x}{15} < _-\dfrac{3}{5}+ \dfrac{4}{15}+\dfrac{-2}{5}\)
BT1: Tìm x, biết
1) \(\dfrac{-2}{5}+\dfrac{5}{3}.\left(\dfrac{3}{2}-\dfrac{4}{15}x\right)=\dfrac{-7}{6}\)
