Official Guide Explanation:
Data Sufficiency #145




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Solution and Metadata

Question: 145
Page: 286
Difficulty: 5 (Moderate)
Category 1: Word Problems > Other >
Category 2: Algebra > Linear Equations-Two Unk >

Explanation: The question gives you one equation: s = 2b. To solve for s, you'll need one more linear equation with one or both of those variables. Statement (1) provides that: (s - 4) = 3(b - 4). The equations are distinct, so you can solve for s. Statement (2) is also sufficient: you can combine (s + 8) = 1.5(b + 8) with the initial equation to solve for s. Choice (D) is correct.

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