<span> 4 1/3 : (5/6 + 0,25) - 3.6 * (7/12 + 1,9) = - 4,94
1. 5/6 + 0,25 = 5/6 + 1/4 = 10/12 + 3/12 = 13/12
2. 4 1/3 : 13/12 = 13/3 * 12/13 = 4
3. 7/12 + 1,9 = 7/12 + 19/10 = 35/60 + 114/60 = 149/60 = 2 29/60
4. 3,6 * 2 29/60 = 36/10 * 149/60 = 894/100 = 8,94
5. 4 - 8,94 = - 4,94
</span>
5х^2у - ху^2 - 4х^2у +
-------- -------
ху^2 -Ху+7=х^2у - ху
+7=х(ху-у)+7
-------------
Х= -1 у=2
(-1)( (-1)*2 - 2) ) +7=
(-1)(-4)+7=4+7=11
50000м^2+1400м^2=51400 м^2
(2801*640-178631)*(775-95823:189)+1630314:798
1)2801*640=1792640
2)1792640-178631=1614009
3)95823:189=507
4)775-507=268
5)1614009*268=432554412
6)1630314:798=2043
7)432554412+2043=432556455