(20-а) - 6 7/18=3 17/18
20-а=3 17/18+6 7/18
20-а=9 24/18
20-а=10 6/18
20-а=10 1/3
а=20-10 1/3
а=9 2/3
<span> 5 7/18 -( x- 2 5/18) = 1 11/18
</span> x- 2 5/18 = 5 7/18-1 11/18
x- 2 5/18 = 4 25/18-1 11/18
x- 2 5/18 = 3 14<span>/18
</span> x = 3 14/18+<span>2 5/18
</span> х = 5 19/18
х= 6 1/18
<span>6+4=10 человек</span>
<span>80/10=8 команд </span>
<span>8*6=48 мальчиков </span>
<span>8*4=32 девочек</span>
<span>Ответ: 48 и 32</span>