Salutare!
[tex](a + 30) \times 2 + 150 \div 3 = 450 \\ (a + 30) \times 2 + 50 = 450 \\ (a + 30) \times 2 = 450 - 50 \\ (a + 30) \times 2 = 400 \\ (a + 30) = 400 \div 2 \\ a + 30 = 200 \\ a = 200 - 30 \\ a = 170 \\ [/tex]
Verificare:
[tex](170 + 30)\times 2 + 150 \div 3 = \\ 200 \times 2 + 50 = \\ 400 + 50 = \\ 450[/tex]
