(4.4а+5.2b)²=(4.4a)²+(5.2b)²=19.36a²+27.04b²
(5.2x+3.6y)²=(5.2x)²+(3.6y)²=27.04x²+12.96y²
-3/8х=1
х=-1:3/8
х=-8/3
-х=-0,03
х=0,03
-12х=3/5
х=-3/5:12
х=-1/20
2у-5=-3
2у=-3+5
2у=2
у=2:2
у=1
8х-5=х-40
8х-х=-40+5
7х=-35
х=-35:7
х=-5
7х+22=х-14
7х-х=-14-22
6х=-36
х=-36:6
х=-6
19-6х=0
19=6х
х=19:6
х=19/6