Răspuns:
[tex]4.2 \times (x + 3) + 2.7 - 2.2x = 3.7 \times 5 \\ 4.2x + 12.6 + 2.7 - 2.2x = 18.5 \\ 2x + 15.3 = 18.5 \\ 2x = 18.5 - 15.3 \\ 2x = 3.2 \\ x = 3.2 \div 2 \\ x = 1.6[/tex]
[tex]5 \times (3.2x + 1.4) + 2 \times (4.2 - x) = 43.4 \\ 16x + 7 + 8.4 - 2x = 43.4 \\ 14x + 15.4 = 43.4 \\ 14x = 43.4 - 15.4 \\ 14x = 28 \\ x = 28 \div 14 \\ x = 2[/tex]
Sper ca te-am ajutat !!!!!
