[tex]\color{green}\huge\boxed{\boxed{A=15}}[/tex]
[tex]\color{red}\huge\boxed{\boxed{B=44}}[/tex]
[tex]\color{purple}\huge\boxed{\boxed{C=35}}[/tex]
[tex]\color{blue}\huge\boxed{\boxed{D=-24}}[/tex]
Regula semnelor:
(+)×(+)=(+)
(+)×(-)=(-)
(-)×(-)=(+)
(+)÷(+)=(+)
(+)÷(-)=(-)
(-)÷(-)=(+)
