Tìm x thuộc Q A. x+5_6=3_4 B.2_3-x=3_5 C. 6_7-(x-1_2)= 5_6

Đáp án:

 $\text{Xin hay nhất}$

Giải thích các bước giải:

$a) x+\dfrac{5}{6}=\dfrac{3}{4}$

$→x=\dfrac{3}{4}-\dfrac{5}{6}$

$→x=\dfrac{-1}{12}$

$b) \dfrac{2}{3}-x=\dfrac{3}{5}$

$→x=\dfrac{2}{3}-\dfrac{3}{5}$

$→x=\dfrac{1}{15}$

$c) \dfrac{6}{7}-(x-\dfrac{1}{2})=\dfrac{5}{6}$

$→x-\dfrac{1}{2}=\dfrac{6}{7}-\dfrac{5}{6}$

$→x-\dfrac{1}{2}=\dfrac{1}{42}$

$→x=\dfrac{1}{42}+\dfrac{1}{2}$

$→x=\dfrac{11}{21}$

Xin hay nhất