$$5\frac{7}{8}=x-4\frac{5}{8}$$
$x = \frac{21}{2} = 10\frac{1}{2} = 10.5$
$$5\times 8+7=8x-\left(4\times 8+5\right)$$
$$40+7=8x-\left(4\times 8+5\right)$$
$$47=8x-\left(4\times 8+5\right)$$
$$47=8x-\left(32+5\right)$$
$$47=8x-37$$
$$8x-37=47$$
$$8x=47+37$$
$$8x=84$$
$$x=\frac{84}{8}$$
$$x=\frac{21}{2}$$
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