Номер 1
(X - 4.1)*5=2.5*(X+8)
5х-20,5=2,5х+20
5х-2,5х=20+20,5
2,5х=40,5
х=40,5:2,5
х=16,2
Номер 2
(3.8-y)*11=5.5*(3.6-y)
41,8-11у=19,8-5,5у
5,5у-11у=19,8-41,8
-5,5у=-22
у=-22:(-5,5)
у=4
5x-20.5=2.5x+20
5x-2.5x=20+20.5
2.5x=40.5
x=40.5:2.5
x=16.2
41.8-11y=19.8-5.5y
41.8-19.8=-5.5y+11y
22=5.5y
y=22:5.5
y=4
