Rewrite the system of inequalities, adding slack variables or subtracting surplus variables as needed. x1 + x2 ? 152x1 + 4x2 ? 23
A. x1 + x2 + s1 = 15
2x1 + 4x2 - s2 = 23
B. x1 + x2 - s1 = 15
2x1 + 4x2 + s2 = 23
C. x1 + x2 - s1 = 15
2x1 + 4x2 - s2 = 23
D. x1 + x2 + s1 = 15
2x1 + 4x2 + s2 = 23
Answer: A
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