Question

[Ác Ma Đến Từ Thiên Đường]

tìm x , biết : 

a,   x *  2 1/4 = 2 3/8 - 3/4                     b, 1/3 : 2 * x - 4/5 = 2/3                               c,1/3 * x : 10 1/5 = 5/3                         d,  5 1/7 : ( x  -  1/3  ) = 3 1/2

MK ĐANG CẦN GẤP LẮM CẤC BẠN Ạ . GIÚP MÌNH NHÉ AI LÀM XONG NHANH , ĐÚNG NHẤT MÌNH TIK CHO HIHIHIHIHI

Answer 1

[⩻Đặฑǥ❤ฑǥọς❤qųỳฑɦ⩼]

a) \(x.2\frac{1}{4}=2\frac{3}{8}-\frac{3}{4}\Rightarrow x.\frac{9}{4}=\frac{19}{8}+\frac{-3}{4}\)\(\Rightarrow x.\frac{9}{4}=\frac{13}{8}\Rightarrow x=\frac{13}{8}:\frac{9}{4}\Rightarrow x=\frac{13}{18}\)

Vậy \(x=\frac{13}{18}\)

b) \(\frac{1}{3}:2.x-\frac{4}{5}=\frac{2}{3}\Rightarrow\frac{1}{3}:2.x=\frac{2}{3}+\frac{4}{5}\)\(\Rightarrow\frac{1}{3}:2.x=\frac{22}{15}\Rightarrow2.x=\frac{1}{3}:\frac{22}{15}\Rightarrow2.x=\frac{5}{22}\)\(\Rightarrow x=\frac{5}{22}.2\Rightarrow x=\frac{5}{44}\)

Vậy \(x=\frac{5}{44}\)

Answer 2

[⩻Đặฑǥ❤ฑǥọς❤qųỳฑɦ⩼]

c) \(\frac{1}{3}x:10\frac{1}{5}=\frac{5}{3}\Rightarrow\frac{1}{3}x:\frac{51}{5}=\frac{5}{3}\)\(\Rightarrow\frac{1}{3}x=\frac{5}{3}.\frac{51}{5}\Rightarrow\frac{1}{3}x=17\Rightarrow x=17:\frac{1}{3}\Rightarrow x=51\)

Vậy \(x=51\)

d) \(5\frac{1}{7}:\left(x-\frac{1}{3}\right)=3\frac{1}{2}\Rightarrow\frac{36}{7}:\left(x-\frac{1}{3}\right)=\frac{7}{2}\)\(\Rightarrow x-\frac{1}{3}=\frac{36}{7}:\frac{7}{2}\Rightarrow x-\frac{1}{3}=\frac{72}{49}\)\(\Rightarrow x=\frac{72}{49}+\frac{1}{3}\Rightarrow x=\frac{265}{147}\)

Vậy \(x=\frac{265}{147}\)