Please help on the Gmat Prep Prob
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4 + x = 1 implies x = -3
4 + y = -5 implies y = -9
e + x = 7 implies e = 7 - (-3) = 10
e + y = n implies 10 + (-9) = n or n = 1
e + z = 10 or z = 10 - 10 = 0
4 + z = m or m = 4
Therefore, m + n = 4 + 1 = 5
The correct answer is [spoiler](C)[/spoiler].
