alleryStart learning →To eliminate +7 from x+7=12 while preserving equality, which step is valid?
Ax+7−7=12+7
Bx+7+7=12−7
Cx+7−7=12
Dx+7−7=12−7
Answer & Solution
Correct answer: D. x+7−7=12−7
Subtracting 7 from both sides preserves equality and removes +7 on the left. The other steps change the two sides differently.
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