Balance these equations using algebraic method and by inspection

1. C₂H₆O    +   K₂Cr₂O₇  +H₂SO₄ → C₂H₄O₂  +  Cr₂(SO₄)₃  +  K₂SO₄  +  H₂O
2. HNO₃  +  P₄O_10   → (HPO₃)₃   +  N₂O₅
3. NaMnO₄ + H₂O₂ + H₂SO₄ → MnSO₄ + Na₂SO₄ + O₂ + H₂O
4. Cl₂O + NH₃ → NH₄Cl + N₂ + H₂O
5. CuCNS + KIO₃ + HCl → HCN + CuSO₄ + ICl + H₂O + KCl
6. C₃H₇NO₂S + O₂ → CO₂ + H₂O + NO₂ +SO₂