Solve. Graph the solution on a number line, and express it in interval notation.5x - 15 < -3
or
5x - 15 > 3 
A. x ? -3.6 or x > 3.6, (-?, -3.6] ? (3.6, ?)
B. (-?, 2.4)
C. 2.4 < x < 3.6, (2.4, 3.6)
D. x < 2.4 or x > 3.6, (-?, 2.4) ? (3.6, ?)
Answer: D
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