Question

1) 2x+3=11
1) 5a+15=3a+15
3) x-72+12x=8-6x​

Answer 1

Ответ:

1) 2x = 8

x = 4

2) 2a = 0

a = 0

3) 13x + 6x = 80

19x = 80

x = 80/19

x = 4 4/19

Объяснение:

Answer 2

Объяснение:

2х + 3 = 11

2х = 11 - 3

2х = 8

х = 8 : 2

х = 4

5а + 15 = 3а + 15

5а - 3а = 15 - 15

2а = 0

а = 0 : 2

а = 0

х - 72 + 12х = 8 - 6х

13х - 72 = 8 - 6х

13х + 6х = 8 + 72

19х = 80

х = 80 : 19

х = 80/19

х = 4 4/19