b)
[tex]\frac{4}{5} a = \frac{2}{25} | : \frac{4}{5} \\\\a = \frac{2}{25} x \frac{5}{4} \\\\a = \frac{1}{5} x \frac{1}{2} \\\\a = \frac{1}{10}[/tex]
c)
[tex]12x = 144 |:12\\x = 12[/tex]
d)
[tex]4x - 11 = 5\\4x = 5 + 11\\4x = 16 |:4\\x = 4[/tex]
e)
[tex]2,3a + 11,7 = -4,4\\2,3a = -4,4 - 11,7\\2,3a = -16,1 |: 2,3\\a = -7[/tex]
