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Algebra / Linear equations in one variable Difficulty: Easy

If 7 x = 28 , what is the value of 8 x ?

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Explanation

Choice B is correct. Dividing both sides of the given equation 7 x = 28 by 7 yields x = 4 . Substituting 4 for x in the expression 8 x yields 84, which is equivalent to 32 .

Choice A is incorrect. This is the value of 214x.

Choice C is incorrect. This is the value of 42 x .

Choice D is incorrect. This is the value of 56 x .