Question

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Answer 1

Answer:

Step 3: Subtraction Property of Equality

Step-by-step explanation:

$20 - 17x = -34x + 60 \\ \: \: \: \: \: \: + 17x \: \: \: \: + 17x \\ \\ 20 = -17x + 60 \\ - 60 \: \: \: \: \: \: \: \: \: \: \: \: \: - 60 \\ \\ -40 = -17x \\ \\ 2\frac{6}{17} = x$

So, the error was made at step 3, where this student combined the incorrect like-terms in the incorrect order.

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