(2/3 + 7/12) = (8/12 + 7/12) = 15/12
16/25 * 15/12 = 4/5 * 3/3 = 4/5
9/10:15/16 = 9/10 * 16/15 = 144/150 = 72/75
4/5 - 72/75 = 60/75 - 72/75 = -12/75
-12/75 = -4/25 = -0.16
-0,25*IyI+3,5=5
<span>-0,25*IyI=5-3,5</span>
IyI=1,5:(-0,25)
IyI=-6
корней нет т.к. -6<0
2*1000000=2000000
2000000:100000=20км