AJUTOOOR! DAU COROANA

Explicație pas cu pas:
[tex]a) \: 3x = 12 \\ x = 12 \div 3 \\ x = 4 \\ \\ b) \: - 3x = 1 \\ x = 1 \div ( - 3) \\ x = - 0.(3) \\ \\ c) \: x + 2 = 1 \\ x = 1 - 2 \\ x = - 1 \\ \\ d) \: x - 4 = \frac{1}{2} \\ x = \frac{1}{2} + {}^{2)} \frac{4}{1} \\ x = \frac{1}{2} + \frac{8}{2} \\ x = \frac{9}{2} \\ \\ e) \: \frac{4}{3} x = 5 \\ x = 5 \div \frac{4}{3} \\ x = 5 \times \frac{3}{4} \\ x = \frac{15}{4} \\ \\ f) \: \frac{5}{6} x = 1 \\ x = 1 \div \frac{5}{6} \\ x = 1 \times \frac{6}{5} \\ x = \frac{6}{5} [/tex]
Succes!