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Verified answer
A+b = 27 => a = -b+27a-b = 3
(-b+27)-b = 3
-2b+27 = 3
-2b = 3-27
-2b = -24
b = 12
a+b = 27
a+12 = 27
a = 15
a×b = 15×12 =180
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