Odpowiedź:
3.
[tex]2x + 3 = 4x - 5 \\ 2x - 4x = - 5 - 3 \\ - 2x = - 8 \: \: | \div ( - 2) \\ x = 4 \\ \\ 2 \times 4 + 3 = 4 \times 4 - 5 \\ 8+ 3 = 16 - 5 \\ 9 = 9[/tex]
L=P
4.
[tex]4y + 2 = y - 7 \\ 4y - y = - 7 - 2 \\ 3y = - 9 \: \: \: | \div 3 \\ y = - 3 \\ \\ 4 \times ( - 3) + 2 = - 3 - 7 \\ - 12 + 2 = - 10 \\ - 10 = - 10[/tex]
L=P
