Question

3a+2b+2c=0,45 a+2b+2c=0,99calc a+b+c

Answer 1

   
[tex]\displaystyle \\ 3a+2b+2c=0,45 \\ a+2b+2c=0,99 \\ ----------- Scadem~ecuatiile. \\ 2a~~~/~~~~/~~= 0,45 -0,99 \\ \\ a = \frac{0,45 -0,99}{2} = \frac{-0,54}{2} = \boxed{ -0,27 }\\ \\ a+2b+2c=0,99 \\ -0,27+2b+2c=0,99 \\ 2b+2c=0,99+0,27 \\ 2(b+c) = 1,26 \\ \\ b+c = \frac{1,26}{2} = \boxed{0,63} \\ \\ a+b+c = -0,27 + 0,63 = \boxed{\boxed{0,36}}[/tex]

Answer 2

Ti-am facut poza la rezolvare. Sper sa intelegi si sper ca am raspuns la timp.