2 (x + 5) = 1 + 2x + 9

infinite solutions

Step-by-step explanation:

First multiply the parentheses by 2, and on the other side add similar terms

2 (x + 5) = 1 + 2x + 9

2x + 10 = 2x + 10

Now we group all the x on the left side of the equation and the numbers on the right side

2x + 10 = 2x + 10

2x - 2x = 10 - 10

0 = 0

This means than the equation has infinite solutions.