\[\boxed{\mathbf{973\ (973).}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\textbf{а)}\ 6x = x \bullet 6 = x + x + x + x + x + x\]
\[\textbf{б)}\ 5y = y \bullet 5 = y + y + y + y + y\]
\[\textbf{в)}\ 10c = c \bullet 10 = c + c + c + c + c + c + c + c + c + c\]