Х+3,12=-5,43
х=-5,43+3,12
х=-2,31
-3+х=5.2
х=5.2+З
х=8.2
8-у=-4,5
-у=-4.5-8
-у=-12.5
у=12.5
-3+х=-5.2
х=-5.2+3
х=-2.2
4.31-х=5.18
-х=5.18-4.31
-х=0.87
х=-0.87
5.23+х=-7.2
х=-7.2-5.23
х=-12.43
х-3.22=-8.1
х=-8.1+3.22
х=-4.88
-14+2х=40
2х=40+14
2х=54
х=54/2
х=27
(5.2-у)-7=-17.4
5.2-у=-17.4+7
5.2-у=-10.4
-у=-10.4-5.2
-у=-15.6
у=15.6
1 3/4 - у = 2 7/10
-у=27/10-7/4
-у=54/20-35/20
-у=19/20
у=-19/20