Odpowiedź:
1) -12x+12
2) 2x+10
3) 4a+3b-7c
[tex]3(2x-4)+6(4-3x) = 6x-12+24-18x = -12x+12\\\\3xy+4x-5xy+10-2x+2xy= 2x+10[/tex]
[tex]2a+(3b-4c) - (3c-2a) = 2a + 3b - 4c - 3c + 2a = 4a + 3b -7c[/tex]
