Answer:
Step-by-step explanation:
[tex]2x + 7 - 1 = 2x + 7[/tex]
[tex] = > 2x - 1 = 2x + 7 - 7[/tex]
[tex] = > 2x - 1 = 2x[/tex]
[tex] = > - 1 = 2x - 2x[/tex]
[tex] = > x = - 1[/tex]
