Ответ:
а)
\(98x - 87x = 594\)
\(11x = 594\)
\(x = 54\).
б)
\(23x - 12x + 6x + 5 = 90\)
\(17x + 5 = 90\)
\(17x = 85\)
\(x = 5\).
в)
\((16x - 10x + 3) \cdot 4 = 132\)
\((6x + 3) \cdot 4 = 132\)
\(6x + 3 = 33\)
\(6x = 30\)
\(x = 5\).
Ответ: а) \(x = 54\); б) \(x = 5\); в) \(x = 5\).
