To eliminate the \(3x\) term from the left side of the equation \(3x + 6 = 3x + 3\) while keeping the equation balanced, you can subtract \(3x\) from both sides. Here's how you can do it step-by-step:
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Start with the original equation: \[ 3x + 6 = 3x + 3 \]
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Subtract \(3x\) from both sides: \[ 3x + 6 - 3x = 3x + 3 - 3x \]
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This simplifies to: \[ 6 = 3 \]
This result indicates that the equation has no solution, as \(6\) does not equal \(3\). Thus, the original equation is inconsistent.
So the correct move to isolate x is to subtract \(3x\) from both sides. The options you provided (adding \(3x\) or multiplying both sides by \(3x\)) would not be appropriate for isolating \(x\) in this case.