a)
5x - 1 = 44
5x = 44 + 1
5x = 45 /:5
x = 9
b)
7 + 4x = -5
4x = -5 - 7
4x = -12 /:4
x = -3
c)
[tex]0,6y + \frac{4}{5} = 12,8[/tex]
[tex]0,6y = 12,8 - \frac{4}{5}[/tex]
[tex]0,6y = \frac{64}{5} - \frac{4}{5}[/tex]
[tex]0,6y = 12[/tex] /:0,6
y = 20
d)
3x + 5 = 26
3x = 26 - 5
3x = 21 /:3
x = 7
e)
[tex]-2x - \frac{2}{3} = 5\frac{1}{3}[/tex]
[tex]-2x = 5\frac{1}{3} + \frac{2}{3}[/tex]
-2x = 6 /:(-2)
x = -3
f)
[tex]\frac{2}{3}x - 8 = 7[/tex] /*3
2x - 24 = 21
2x = 21 + 24
2x = 45 /:2
x = 22,5
g)
[tex]\frac{x}{3} - 6 = 8[/tex] /*3
x - 18 = 24
x = 24 + 18
x = 42
h)
[tex]\frac{x}{12} + 8 = -4[/tex] /*12
x + 96 = -48
x = -48 - 96
x = -144
i)
[tex]\frac{x}{3} - 3 = -6[/tex] /*3
x - 9 = -18
x = -18 + 9
x = -9
