Ответы и объяснения

2013-11-15T00:54:16+04:00
2, 8-х+3, 7=3, 2
-x=3,2-2.8-3,7
-x=
−3,3
x=3.3

2.8 - х + 3.7 = 3.2
-х = 3.2 - 2.8 - 3.7
-х = -3.3
х = 33

(5.6 + у) - 3.8 = 4.4
(5.6 + у) = 4.4 + 3.8
5.6 + у = 8.2
у = 8.2 - 5.6
у = 2.6
2013-11-15T00:56:15+04:00
1) 2.8-x+3.7=3.2
2.8+3.7-3.2=x
x=3.3
2) (5.6+y)-3.8=4.4
y=4.4-5.6+3.8
y=2.6