Đáp án`+`Giải thích các bước giải:
` a) ->` \(\left[ \begin{array}{l}x-1,7 = 2,3\\x - 1,7 = -2,3\end{array} \right.\)
`->` \(\left[ \begin{array}{l}x = 2,3 + 1,7 = 4\\x=-2,3+1,7=-0,6\end{array} \right.\)
` b)->` \(\left[ \begin{array}{l}x+3/4=1/3\\x+3/4=-1/3\end{array} \right.\)
`->` \(\left[ \begin{array}{l}x=1/3 - 3/4 = -5/12\\x=-1/3 - 3/4=-13/12\end{array} \right.\)
` c)->` \(\left[ \begin{array}{l}3/2-x=1/2\\3/2-x=-1/2\end{array} \right.\)
`->` \(\left[ \begin{array}{l}x=3/2-1/2=1\\x=3/2-(-1/2)=2\end{array} \right.\)
` d) ->` \(\left[ \begin{array}{l}1-x=3\\1-x=-3\end{array} \right.\)
`->` \(\left[ \begin{array}{l}x=1-3=-2\\x=1-(-3)=4\end{array} \right.\)
