Ответ:
2) \(2.9x-1.1x=5.04\)
\(1.8x=5.04\)
\(x=5.04:1.8=2.8\)
3) \(x-0.64x=2.808\)
\(0.36x=2.808\)
\(x=2.808:0.36=7.8\)
Ответ: 2) \(x=2,8\); 3) \(x=7,8\).
2) \(2.9x-1.1x=5.04\)
\(1.8x=5.04\)
\(x=5.04:1.8=2.8\)
3) \(x-0.64x=2.808\)
\(0.36x=2.808\)
\(x=2.808:0.36=7.8\)
Ответ: 2) \(x=2,8\); 3) \(x=7,8\).