Given the absolute value of a = 4, the absolute value of B = 5, find the value of a + B-4

A = 4, B = 5, a + B-4 = 5
2.a=-4 b=5 a+b-4=-3
3..a=4 b=-5 a+b-4=-5
4.a=-4 b=-5 a+b-4=-13

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