Решите уравнение: (3-2x)+(4-3x)+(5-5x)=12+7x.

\[(3 - 2x) + (4 - 3x) + (5 - 5x) =\]

\[= 12 + 7x\]

\[3 - 2x + 4 - 3x + 5 - 5x = 12 + 7x\]

\[- 10x - 7x = 12 - 3 - 4 - 5\]

\[- 17x = 0\]

\[x = 0.\]