1) x - 7 8/11 = 2 5/11,
x = 2 5/11 + 7 8/11,
x = 27/11 + 85/11,
x = 112/11.
2) 3 7/17-( x+1 4/17) = 1 9/17
58/17 - x - 21/17 = 26/17
37/17 - x = 26/17
- x = 26/17 - 37/17
-x = -11 / 17
x = 11/17
№ 4
12/5 = 2 4/10 = 2,4
49/20 = 2 45/100 = 2,45
57/50 = 1 14/100 = 1,14
15/8 = 1 875/1000 = 1,875
81/40 = 2 25/1000 = 2,025