Graduate Management Admission Test (GMAT) Practice Test

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For what value of x does the expression 2x = 10 hold true?

x = 2
x = 5
x = 10
x = 0

The correct answer is: x = 5

To determine the value of x that satisfies the equation 2x = 10, you can isolate x by performing algebraic operations. Start by dividing both sides of the equation by 2. This gives you x = 10 / 2. Simplifying this results in x = 5. Thus, when you substitute x back into the original equation, it checks out: 2(5) equals 10, confirming that this is the correct solution. This demonstrates how solving for x involves manipulating the equation to find the value that maintains the equation's truth. This is a fundamental technique in algebra that applies to many problems of this nature.