вычислити пож с 1 по 10

Ответы:

х + 36 = 72 + 15                             7)  36 = 78х 2х

х = 72 + 15 36                                   36 = 76х

х = 51                                                   х = 36 : 76

                                                                х = 9/19

135 х = 102 -15

135 х = 87                                    8)  45 +30 = 112 х

х = 135 87                                         75 = 112 х

х = 48                                                   х = 112 75

                                                            х =37

2х + 18х + 20х = 151 -31

40х = 120                                      9)  8у  + 3у  = 77

х = 30                                                  11у = 77

                                                             у = 7

41 10 х х = 81

31 2х = 81                                  10) 2а +3а +10а 4а = 11а

2х = 31 81                                          а = 10

2х = -50                                              11а = 11 * 10 = 110

х = 25

9х 4х = 135 30

5х = 105

х = 21

1. х+36=72+15

х+36=87

х=87-36

х=51

2. 135-х=102-15

135-х=87

х=135-87

х=48

3. 2х+18х+20х=151-31

40х=120

х=120:40

х=30

5. 41-10-х-х=81

31-2х=81

2х=31-81

2х= -50

х= -50:2

х= -25

6. 9х-4х=135-30

5х=105

х=105:5

х=21

8. 45+30=112-х

х=112-45-30

х=37

9. 8у+3у=77

11у=77

у=77:11

у=7

10. 2а+3а+10а-4а=11а

при а =10

11*10=110