Question

2x+5=4x+9 помогите пожалуйста

Answer 1

2x + 5 = 4x + 9

2x + 5 - 2x = 4x + 9 - 2x

5 = 2x + 9

5 - 9 = 2x + 9 - 9

-4 = 2x

-4/2 = 2x/2

-2 = x