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Algebra / Linear equations in one variable Difficulty: Easy

 

the fraction 4 x over 5, equals 20

In the equation above, what is the value of x ?

 

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Explanation

Choice A is correct. Multiplying both sides of the equation by 5 results in 4 x equals 100. Dividing both sides of the resulting equation by 4 results in x equals 25.

Choice B is incorrect and may result from adding 20 and 4. Choice C is incorrect and may result from dividing 20 by 5 and then multiplying the result by 4. Choice D is incorrect and may result from subtracting 5 from 20.