1) \(18n - 12n - 3n = 186\)
\(3n = 186\)
\(n = \frac{186}{3}\)
\(n = 62\)
2) \(25a - 7a - 8a = 400\)
\(10a = 400\)
\(a = \frac{400}{10}\)
\(a = 40\)
3) \(2x + 8x - x = 243\)
\(9x = 243\)
\(x = \frac{243}{9}\)
\(x = 27\)
4) \(6y - y + 4y = 234\)
\(9y = 234\)
\(y = \frac{234}{9}\)
\(y = 26\)
Ответ:
1) n = 62
2) a = 40
3) x = 27
4) y = 26