Odpowiedź:
zadanie 1
[tex]9 - y - 6 + 5y = 3 + 4y[/tex]
[tex]7 - x + 8x - 11 = - 4 + 7x[/tex]
[tex] \frac{a}{5} + 5a = \frac{1}{5} a + 5a = 5 \frac{1}{5} a[/tex]
[tex]0.7c - c = - 0.3c[/tex]
zadanie 2
[tex]4 \times 0.8x = 3.2x[/tex]
[tex]12 \times \frac{d}{9} = \frac{4d}{3} = 1 \frac{1}{3} d[/tex]
[tex] \frac{1}{6} x \div 2 = \frac{1}{6} x \times \frac{1}{2} = \frac{1}{12} x[/tex]
[tex]4.8y \div ( - 8) = - 0.6y[/tex]
zadanie 3
[tex] - 9y + 2x + 3y + ( - 9x) = - 9y + 2x + 3y - 9x = - 6y - 7x[/tex]
