Free Practice Question
PS · Problem Solving
sub-505
Algebra
Given that the mean of three values is 4x and two of those values are and , what is the third value expressed in terms of x and y?
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B
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D
E
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Official Explanation
Official
Let the third value be B. According to the problem: => (3x-2y +…
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What it tests
Your ability to manipulate linear and quadratic expressions, substitute unknowns, and solve equations under time pressure.
Common trap
Losing a sign when moving terms across the equals sign, or dividing both sides by a variable that could equal zero.
Details
Difficulty
sub-505
Type
PS
Category