<span>-9*(6х + 1) = -45*(2х+2,6),
-54х - 9 = -90х - 117,
-54х + 90х = -117 + 9,
36х = -108,
х = -108 : 36,
х = -3,
</span>
<span>3\8+0,25+1\6 = 3/8 + 5/20 +1/6 = 3/4 +5/20 = 15/20 +5/20 = 20/20 = 1
1 / 1 7/12 = 1 / 19/12 = 12/19</span>
16+4,5=20,5 16-4,5=11,5 16×4,5=72
9-1=8 получил Антон
8-2=6 задумал Антон