log (a-b)÷log 5 =log 4÷log 1/2=log (a+b)÷log 2
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Log(a-b)X Log 1/2 = Log4XLog5
a-b=40
a+b=16
2a = 56
a=28
b = 16-28
b =-12
a-b=40
a+b=16
2a = 56
a=28
b = 16-28
b =-12
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