`|x - 2| = 7 - 2x `
ĐK: `7-2x >= 0``<=>` `x <= 7/2`
`<=>` \(\left[ \begin{array}{l}x-2=7-2x\\x-2=-7+2x\end{array} \right.\)
`<=>` \(\left[ \begin{array}{l}x+2x=7+2\\-x-2x=-7+2\end{array} \right.\)
`<=>` \(\left[ \begin{array}{l}3x=9\\-3x=-5\end{array} \right.\)
`<=>` \(\left[ \begin{array}{l}x=3\\x=5/3\end{array} \right.\)
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