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B. 2-5+6-7 = -4
C. -3-7+4+2 = -4
2. 2 - 5 - (-6) - 7 = 2 - 5 + 6 - 7 = (-4)
3. -3 - 7 - (-4) - (-2) = -3 - 7 + 4 + 2 = (-4)
semoga membantu ^_^
jadikan yang terbaik yaahhh...