To solve for x, you need to isolate it on one side of the equation.
Starting with the equation x + 3 = 12, you can isolate x by subtracting 3 from both sides of the equation.
x + 3 - 3 = 12 - 3
This simplifies to x = 9.
Therefore, the solution to the equation x + 3 = 12 is x = 9.
x+3=12
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