<span>(4 2/3-5/9×2 4/7)+(2 1/7+1 2/3)
</span>1) 5/9 * 2 4/7 = 5/9 * 18/7 = 90/ 63 = 30/21 = 10/7 = 1 3/7
2) 4 2/3 - 1 3/7 = 14/3 - 10/7 = 98/21 - 30/21 = 68/21 = 3 5/21 = 3 5/21
3) 2 1/7 + 1 2/3 = 15/7 + 5/3 = 45/21 + 35/21 = 80/21 = 3 17/21
4) 3 5/21 + 3 17/21 = 6 22/21 = 7 1/21
2/5 * (-5/2)х * (-5) = -1х * (-5) = 5х
Хай яблука ласунчика-х,тоди яблука хвалька-2х
2х-2=х+2
х=4
4*2=8
8+4=12
Ответ 12
<span>38 * (-3) - (-24) * (-4) + (-16) * (-30) =(-114) + 96 - 480 = (- 270)</span>