Đáp án `+` Giải thích các bước giải `!`
`a)`
`1/8-(x-1/2) = 1/(\sqrt{9})`
`<=> 1/8-x+1/2 = 1/3`
`<=> (1/8+1/2)-x = 1/3`
`<=> (1/8+4/8)-x = 1/3`
`<=> 5/8-x = 1/3`
`<=> x = 5/8-1/3`
`<=> x = (15)/(24)-(8)/(24)`
`<=> x = 7/(24)`
Vậy `x = 7/(24)`
`b)`
`|5/(18)-x|+1/5 = 1/2`
`<=> |5/(18)-x| = 1/2-1/5`
`<=> |5/(18)-x| = 5/(10)-2/(10)`
`<=> |5/(18)-x| = 3/(10)`
`<=>` \(\left[ \begin{array}{l}\dfrac{5}{18}-x=\dfrac{3}{10}\\x=\dfrac{5}{18}-x=-\dfrac{3}{10}\end{array} \right.\)
`<=>` \(\left[ \begin{array}{l}x=-\dfrac{1}{45}\\x=\dfrac{26}{45}\end{array} \right.\)
Vậy `x=-(1)/(45)` hoặc `x=(26)/(45)`
