Free Practice Question
PS · Problem Solving
sub-505
Algebra
On a straight line, point D lies between points E and F. EF = 60, ED = 3y, and DF = 3y + 12. What is the value of y?
Answer Choices
Correct answer marked below8
Correct
B
10
C
12
D
14
E
16
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Official Explanation
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On a straight line, point D is situated between points E and F. Given that EF = 60, ED = 3y, and DF = 3y + 12, we can set up the equation: . This…
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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