Розвяжи ривняння 27:9·c=15 7·у+9=51 26+(72:n)=7·5

решение уравнений: c = 5 y = 6 n = 8

27:9×с=15                     7×у+9=51                      26+(72:н)=7×5 3с=15                           7у=51-9                         26+(72:н)=35 с=15:3                          7у=42                            72:н=35-26 с=5                               у=42:7                           72:н=9 27:9×5=15                     у=6                                н=72:9                                      7×6+9=51                       н=8                                                                           26+(72:8)=7×5