5)
b) [tex](-11)[/tex]x[tex]y = 121 <=> y = \frac{121}{-11} <=> y = -11[/tex]
c) [tex]z = 6[/tex]
6)
b) [tex]y:38 = 10 <=> y = 38[/tex]x[tex]10 <=> y = 380[/tex]
c) [tex]z = 342[/tex]
7)
b) [tex]-8y+800 = 0 | (-800) <=> -8y = -800 <=> y = \frac{-800}{-8} <=> y = 100[/tex]
c) [tex]22z + 440 = 0 <=> 22z = -440 <=> z = -20[/tex]
x -> inmultire
