10:(х- 1) = 515 : (x + 1) - 1 = 210-16:х=6. помогите решить эти уравнения ​

Question

10:(х- 1) = 515 : (x + 1) - 1 = 210-16:х=6. помогите решить эти уравнения ​

Answer 1

10 ÷ (x - 1) = 5

10 ÷ 5 = x - 1

2 = x - 1

2 + 1 = x

x = 3

15 ÷ (x + 1) - 1 = 2

15 ÷ (x + 1) = 2 + 1

15 ÷ (x + 1) = 3

15 ÷ 3 = x + 1

5 = x + 1

5 - 1 = x

x = 4

10 - 16 ÷ x = 6

-16 ÷ x = 6 - 10

-16 ÷ x = -4

-16 ÷ (-4) = x

x = 4