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What is the most efficient first step to isolate the variable term on one side of this equation?

-9x = 4x + 5
O Subtract 5 from both sides.
O Add 5 to both sides.
X Subtract 9x from both sides.
O Add 4x to both sides.
Done
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1 Answer

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Answer: Add 4x to both sides.

Explanation:

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