When solring 45+5 Lz 7s +137 we get an expression egviva lknt to -4) + a What are the ralues for a and B7 a) 11 y b) –11 y 21 c) 4 y 5 d) 121 y 231

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A:

Q: (a-5)

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Q: Why is "B" 2?

A: