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candygal79
- Senior | Next Rank: 100 Posts
- Posts: 49
- Joined: Mon Feb 10, 2014 1:18 am
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From the stem, we need some information about how a and c relate to each other.
Statement 1 tells us that a + b = 3, but there's nothing about c. Not sufficient.
Similarly, 2 gives us information about c (4 = c - b), but there's nothing about A. Not sufficient.
Combined, we can rearrange each equation and solve.
a + b = 3
b = 3 - a
4 = c - b
b = c - 4
3 - a = c - 4
7 - a = c
7 = a + c
We still don't know if a*c > 5, though. If a = 3, then c = 4, and ac = 12. If a = .5, then c = 6.5, and ac = 6.5 * .5 = 3.25. We don't have a definitive answer.
