A)-5x=-10
x=2
б)-8y+25=0
8y=25
y=0,32
в) -t+3=0
-t=-3
t=3
г)4a-a=3
3a=3
a=1
1)20,22. 2).25,52,55,22,. 3)30 , 33. 4)55,35,33,
(8 7/12 - 2 17/36) * 2,7 - 4 1/3 : 0,065 = - 50 1/6
1) 8 7/12 - 2 17/36 = 8 21/36 - 2 17/36 = 6 4/36 = 6 1/9
2) 6 1/9 * 2,7 = 55/9 * 27/10 = 165/10 = 16,5
3) 4 1/3 : 0,065 = 13/3 : 65/1000 = 13/3 * 1000/65 = 1000/15 = 66 2/3
4) 16 5/10 - 66 2/3 = 16 15/30 - 66 20/30 = - 50 5/30 = - 50 1/6