[tex] - (x + 4) - 19 = 7 \\ x + 4 = - 19 - 7 \\ x + 4 = - 26 \\ x = - 26 - 4 \\ x = - 30[/tex]

[tex]1 - x = \frac{3}{5} + \frac{1}{10} \\ 1 - x = \frac{6}{10} + \frac{1}{10} \\ 1 - x = \frac{7}{10} \\ x = 1 - 0.7 \\ x = 0.3[/tex]

[tex] - 5 + (a - 25) = - 4 \\ a - 25 = - 4 + 5 \\ a - 25 = 1 \\ a = 1 + 25 \\ a = 26[/tex]

[tex]7.2 - (6.2 - x) = 2.2 \\ 6.2 - x = 7.2 - 2.2 \\ 6.2 - x = 5 \\ x = 6.2 - 5 \\ x = 1.2[/tex]