Final answer:
To solve the equation 2x + 9 = x + 1, subtract x from both sides, then subtract 9 from both sides to isolate x. The solution is x = -8.
Step-by-step explanation:
To solve the equation 2x + 9 = x + 1, we need to isolate the variable x on one side of the equation. Subtract x from both sides:
2x - x + 9 = x - x + 1
x + 9 = 1
Subtract 9 from both sides:
x + 9 - 9 = 1 - 9
x = -8
Therefore, the solution to the equation is x = -8.