Решите уравнения: 1. x/7=12. 2. 56/y=8. 3. x+5/21=10.

1)  х : 7 = 12              2)  56: у = 8                   3)   х + 5 : 21 = 10

     х = 12 * 7                   у = 56 : 8                        х + 5 = 10 * 21

     х = 84                         у = 7                               х + 5 = 210

                                                                               х = 210 - 5

                                                                               х = 205