Răspuns:
[tex]a)7x - 12 = |( - 4) {}^{2} | \\ 7x - 12 = | {4}^{2} | \\ 7x - 12 = {4}^{2} \\ 7x - 12 = 16 \\ 7x = 16 + 12 \\ 7x = 28 \\ x = 28 \div 7 \\ x = 4 \\ [/tex]
[tex]b)5 \div z = | - 5 {}^{0} | \\ \frac{5}{z} = | - 1| \\ \frac{5}{z} = 1 \\ z = 5[/tex]
iar la c nu stiu. nu imi da scuze
