[tex]1,7\ \textless \ x\ \textless \ 4,2[/tex]
[tex]0,7\ \textless \ y\ \textless \ 2,5[/tex]
a)
[tex]dar : 1,4\ \textless \ 2y\ \textless \ 5[/tex]
⇒[tex]1,7+1,4\ \textless \ x+2y \ \textless \ 4,2+5[/tex]
⇒[tex]3,1\ \textless \ x+2y \ \textless \ 9,2[/tex]
b)
1,1x
[tex]1,7*1,1\ \textless \ 1,1x\ \textless \ 4,2*1,1[/tex]
[tex]1,87\ \textless \ 1,1x\ \textless \ 4,62[/tex]
0,2y
[tex]0,7*0,2\ \textless \ 0,2y\ \textless \ 2,5*0,2[/tex]
[tex]0,14\ \textless \ y\ \textless \ 0,5[/tex]
⇒[tex]1,87+0,14\ \textless \ 1,1x+0,2y \ \textless \ 4,62+0,5[/tex]
⇒[tex]2,01\ \textless \ 1,1x+0,2y \ \textless \ 5,12[/tex]
