Odpowiedź :
1.
[tex]18x+27y-9 = 9(2x+3y-1)[/tex]
2.
[tex](7x^{2}-6x)-(2x-9x^{2}) = 7x^{2}-6x-2x+9x^{2} = 16x^{2}-8x[/tex]
3.
[tex]4(3x-y) - 2(6x-2y) = 12x-4y -12x+4y = 0[/tex]
1.
[tex]18x+27y-9 = 9(2x+3y-1)[/tex]
2.
[tex](7x^{2}-6x)-(2x-9x^{2}) = 7x^{2}-6x-2x+9x^{2} = 16x^{2}-8x[/tex]
3.
[tex]4(3x-y) - 2(6x-2y) = 12x-4y -12x+4y = 0[/tex]