SAT Math · Nonlinear equations in one variable · medium
What is the larger of the two solutions to |4x - 8| = 3x?
What is the larger of the two solutions to ?
Answer and explanation
Answer: C: 8
Split into two cases. Case 1: gives . Case 2: gives , so . Both solutions give a nonnegative right side , so both are valid. Check : . Check : . The larger solution is 8, choice C. Choice A () is the smaller solution. Choice B (4) and choice D (12) do not satisfy the equation: and .
More Nonlinear equations in one variable questions
- Question 10 · mediumFor what positive value of k does the equation x² - kx + 9 = 0 have exactly one real solution?
- Question 11 · hardThe equation x² - 7x + c = 0 has two real solutions that differ by 3. What is the value of c?
- Question 12 · mediumWhat value of x satisfies 8^x+1 = 32^x-2?
- Question 26 · mediumIf |2x - 5| = 11 and x is negative, what is the value of x?
- Question 33 · mediumWhat is the solution to √(2x+3) = x, after rejecting any extraneous candidate?
- Question 34 · mediumWhat is the sum of all values of x that satisfy 2^x²-5x = 2^-6?
Learn the method behind questions like this one
The SAT Math course teaches each tested skill through lessons, step-by-step solutions to sample problems, the complete study guide and full-length practice tests.