Odpowiedź:
Zad 3
a) 2x - 3 = -6 - 3 = -9
b) -9 - 2y = -9 - 10 = -19
c) 3x + 2y - 4 = -9 + 5 - 4 = -8
d)[tex] \frac{1}{5} a(a - 6) = 3(15 - 6) = 3 \times 9 = 27[/tex]
Zad 4
[tex]3c + 4 - 7c + 2c - 5 + 1 - 0.3 = 3.9 + 4 + 9.1 + 2.6 - 5 + 1 - 0.3= 15.3[/tex]
