Question

Помогите решить уравнение
Х-30=50+40

Answer 1

Х - 30 = 50 + 40
Х - 30 = 90
Х = 90 + 30
Х = 120

Answer 2

х- 30=50+40

Answer 3

х-30=90

Answer 4

х = 90+30 =120