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Equivalent expressions SAT question
Math · Advanced Math · Medium · Answer it here, explanation included.
Which of the following is equivalent to the given expression?
ExplanationShow
Choice C is correct. Distributing the negative sign to the terms in the second parentheses yields 
. This expression can be rewritten as 
. Combining like terms results in 
.
Choice A is incorrect and may result from not distributing the negative sign to the 7. Choice B is incorrect and may result from adding 
to 
instead of subtracting . Choice D is incorrect and may result from adding the product of 
and x to the product of 3 and 7.
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