Уравнения 18

Решение уравнений:

а) \[x - 12 = 0\]
\[x = 12\]

б) \[25 + x = 25\]
\[x = 25 - 25\]
\[x = 0\]

в) \[x : 108 = 1\]
\[x = 108 \times 1\]
\[x = 108\]

г) \[y : 1 = 37\]
\[y = 37 \times 1\]
\[y = 37\]

д) \[x \times 15 = 0\]
\[x = 0 \div 15\]
\[x = 0\]

е) \[x \times 18 = 18\]
\[x = 18 \div 18\]
\[x = 1\]