Question

Ofer 25 de puncte ! exericitiul 12 !

Answer 1

ab=9,45
(a+1)*b=12,95

ab+b=12,95
9,45+b=12,95
b=12,95-9,45
b=3,5


verificare a=9,45:3,5=2,7
(2,7+1)*3,5=3,7*3,5=12,95
adevarat , bine rezolvat

Answer 2

[tex]\it a\cdot b = 9,45\ \ \ \ (*) \\ \\ (a+1)\cdot b = 12,95 \Rightarrow a\cdot b+b = 12,95 \stackrel{(*)}{\Longrightarrow} 9,45+b=12,95\Rightarrow \\ \\ b = 12,95-9,45 \Rightarrow b = 3,5[/tex]