Ответ:3.4 · x = 26.18; \(x = 26.18 : 3.4 = 7.7\).2.5 · x = 4.5; \(x = 4.5 : 2.5 = 1.8\).7.6 · x = 19; \(x = 19 : 7.6 = 2.5\).Ответ: а) x = 7.7; б) x = 1.8; в) x = 2.5.