Đáp án:
Giải thích các bước giải:
$d)2x(x-\dfrac{1}{7})=0\\ <=> \left[ \begin{array}{l}2x=0\\x-\dfrac{1}{7}=0\end{array} \right. <=> \left[ \begin{array}{l}x=0\\x=\dfrac{1}{7}\end{array} \right. vậy.x = 0 x=\dfrac{1}{7} $
$f) -\dfrac{11}{12}x+0,25=\dfrac{5}{6}\\ -\dfrac{11}{12}+-\dfrac{1}{4}=-\dfrac{5}{6}\\ -\dfrac{11}{12}x=-\dfrac{7}{12}\\ <=> x=-\dfrac{7}{11}\\ vậy.-\dfrac{7}{11}$
$\dfrac{3}{4}+\dfrac{2}{5}x=\dfrac{29}{60}\\ \dfrac{2}{5}x=-\dfrac{4}{15}\\ <=> x=\dfrac{2}{3}\\ vậy.x=-\dfrac{2}{3}$
chúc bạn học tốt T^T
