Question

[Nguyễn Anh Thư]

tìm x

a,3 4/5 : 8/5 = 0,25 :x

b, 2x+3/24 = 3x-1/32

c, 13x-2/2x+5=76/17

Answer 1

[Lấp La Lấp Lánh]

a) \(3\dfrac{4}{5}:\dfrac{8}{5}=0,25:x\)

\(\Rightarrow\dfrac{19}{5}.\dfrac{5}{8}=\dfrac{x}{4}\)

\(\Rightarrow\dfrac{x}{4}=2\Rightarrow x=8\)

b) \(2x+\dfrac{3}{24}=3x-\dfrac{1}{32}\)

\(\Rightarrow x=\dfrac{1}{8}+\dfrac{1}{32}=\dfrac{5}{32}\)

c) \(\dfrac{13x-2}{2x+5}=\dfrac{76}{17}\)

\(\Rightarrow221x-34=152x+380\)

\(\Rightarrow69x=414\Rightarrow x=6\)