Hey there!
2 + x = 11
x + 2 = 11
SUBTRACT 2 to BOTH SIDES
x + 2 - 2 = 11 - 2
CANCEL out: 2 - 2 because that gives you 0
KEEP: 11 - 2 because that helps solve for x
x = 11 - 2
11 - 2 = x
x = 9
9 = x
Therefore, your answer is: x = 9
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)