Question

Решите уравнение:
3x(x-2) - x(3x+3) = 18

Answer 1

...
3х²-6х-3х²-3х=18
-9х=18
х=-2

Answer 2

3х(х-2)-х(3х+3)=18
3х²-6х-3х²-3х=18
-9х=18
х=18:(-9)
х= -2