Question

15+(x-1)=20 помогите решить.

Answer 1

15 + (x - 1) = 20

15 + х - 1 = 20

14 + х = 20

х = 20 - 14

х = 6

Ответ: 6

Answer 2

х-1=20-15

Answer 3

х-1=5

Answer 4

$x - 1 = 20 - 15 \ x - 1 = 5 \ x = 5 + 1 \ x = 6$
Ответ: 6