Odpowiedź:
a) 4x + 6 = 18
4x = 12
x = 3
b) [tex]3\frac{p}{5} = 15[/tex]
[tex]\frac{p}{5} = 5[/tex]
p = 25
c) [tex]a + 1 \frac{1}{3} = 2\frac{1}{5}[/tex]
[tex]a = 2\frac{1}{5} - 1\frac{1}{3}[/tex]
[tex]a = 2\frac{3}{15} - 1\frac{5}{15}[/tex]
[tex]a = \frac{13}{15}[/tex]