3,5x + 1,76 = 4,56

\(3{,}5x + 1{,}76 = 4{,}56\)

\(3{,}5x = 4{,}56 - 1{,}76 = 2{,}8\)

\(x = 2{,}8 : 3{,}5 = 0{,}8\)

Ответ: \(x = 0{,}8\).