To solve for y in the equation 9 + y = 18, we need to isolate y on one side of the equation.
First, we can simplify the left side of the equation by adding 9 and y:
9 + y = 18
9 + y - 9 = 18 - 9
y = 9
Therefore, the solution is y = 9.
Solve for y, 9 + y = 18
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