$$(3x-60+\frac{3x}{5})-(\frac{31x}{7}=170$$
$x = -\frac{5000}{63} = -79\frac{23}{63} \approx -79.365079365$
$$60x-1200+4\times 8x-5\times 31x=3800$$
$$60x-1200+32x-5\times 31x=3800$$
$$92x-1200-5\times 31x=3800$$
$$92x-1200-155x=3800$$
$$-63x-1200=3800$$
$$-63x=3800+1200$$
$$-63x=5000$$
$$x=\frac{5000}{-63}$$
$$x=-\frac{5000}{63}$$
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