College Algebra CLEP Prep Practice Exam

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Prepare for the College Algebra CLEP Test with our comprehensive practice exam. Study with flashcards and multiple choice questions, each offering clues and detailed explanations. Achieve your best score and excel in your exam!

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What is the value of x in the system below?

2
−2
4
−4

The correct answer is: −2

In this system, there are two equations and two unknown variables, x and y. We can solve for both unknowns by using the elimination method. The given equations are 2x - 2y = -8 and 4x + 4y = -16. By multiplying the first equation by 2, we can eliminate the y variable and solve for x. The resulting equation is 4x - 4y = -16. When we subtract this equation from the second equation, we get 8x = 8. Therefore, x = 1. Substituting x=1 in either original equation, we can solve for y, which is also equal to -1. Both values of x and y satisfy the given system. Therefore, the value of x in this system is -1. Option A is incorrect because 2 is the value of y,