<span>(470-х):3+65=172</span>
<span>(470-х):3=172-65</span>
<span>(470-х):3=107</span>
<span>470-х=107*3</span>
<span>470-х=321</span>
<span>х=470-321</span>
<span>х=149</span>
<span>---------------</span>
72:8+1*14+48:28- 48:0=57