Объяснение:

а.х+5=0

х=-5

c. x+3=7

x=7-3

x=4

e.

[tex] \frac{2}{3} - z = \frac{5}{6} \\ \frac{2}{3} - \frac{5}{6} = z \\ \frac{4 - 5}{6} = z \\ z = - \frac{1}{6} [/tex]

g.

[tex]n + \frac{5}{6} = \frac{11}{6} \\ n = \frac{11}{6} - \frac{5}{6} \\ n = \frac{6}{6} \\ n = 1[/tex]

i.

[tex]2 - x = - 7 \\ 2 + 7 = x \\ x = 9[/tex]

k.

[tex] \frac{x}{3} = \frac{7}{12} \\ x = \frac{7 \times 3}{12} \\ x = \frac{7}{4} \\ x = 1.75[/tex]

m.

[tex] \frac{x}{2} = - 7 \\ x = - 14[/tex]