Question

Реши уравнения 100-d=20+10

Answer 1

100 - d = 20+10
100-d = 30
D = 100 - 30
D = 70
Ответ: 70

Answer 2

100 - d = 20 + 10
- d = 20 + 10 - 100
- d = 30 - 100
-d = - 70
d = 70