4: =>x(2/3-1/2)=5/12
=>\(x\cdot\dfrac{1}{6}=\dfrac{5}{12}\)
hay x=5/2
5: \(\Leftrightarrow x-\dfrac{22}{3}=\dfrac{3}{2}:\dfrac{9}{4}=\dfrac{3}{2}\cdot\dfrac{4}{9}=\dfrac{2}{3}\)
=>x=2/3+22/3=8
\(\dfrac{x+2}{7}\)=\(\dfrac{-36}{28}\)
tìm x:
2 tìm x
a) x+25=40
b) 198-(x+4)=120
c) (2x-7).3=125
d) x +16⋮x+1
Tìm X
Tìm X
Tìm X
bài 45: Tìm x, biết:
a) x=\(\dfrac{-1}{2}+\dfrac{3}{4}\); b) \(\dfrac{x}{5}=\dfrac{5}{6}+\dfrac{-19}{30}\)
tìm x, biết:
e) \(\dfrac{2}{7-x}\)=\(\dfrac{18}{45}\) f)\(\dfrac{2x+3}{3}\)=\(\dfrac{50}{15}\) g)\(2\dfrac{x}{7}\)=\(\dfrac{75}{35}\) h)\(2\dfrac{3}{x}\)=\(\dfrac{13}{x}\)(x khác 0)
Tìm \(x\), biết :
a) \(x=\dfrac{1}{4}+\dfrac{2}{13}\)
b) \(\dfrac{x}{3}=\dfrac{2}{3}+\dfrac{-1}{7}\)
Tìm \(x\) biết :
a) \(x=\dfrac{-1}{2}+\dfrac{3}{4}\)
b) \(\dfrac{x}{5}=\dfrac{5}{6}+\dfrac{-19}{30}\)
