3x + 3 = 21
To solve for x, we need to isolate the variable on one side of the equation.
Subtracting 3 from both sides gives:
3x = 21 - 3
3x = 18
Now, divide both sides by 3:
x = 18/3
x = 6
The solution is x = 6.
Solve 3x + 3 = 21
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