2. 60-40=20,65-45=20
3. Квадрат все стороны равны
70009-x=48434
x=70009-48434
x=22575
-----------------------------
70009-22575=48434
48434=48434
4214:x=7
x=4214:7
x=62
---------------------------------
4214:62=7
7=7
A) -43-39+43-51=-90
Б) 86-34-56+24 = (86+24) - (34+56) = 110 - 90 = 20
В) -4/25 + (-7/33) - (-26/33) = -4/25 + (-7/33 + 26/33) = -4/25 + 19/33 = -132/825 + + 475/825 = 343/825
Г) -8/33 + (-7/33) - (-26/33) = -8/33 - 7/33 + 26/33 = -15/33 + 26/33= 11/33
1)2 1/3-3 3/8=-1 1/24
2)4,8 * (-1 1/24)=-1 5/20=-1 1/4
3) -1 1/4+2 4/9=1 7/28