### *Log & Exponential Equations: log_x 81 =4

A http://www.door2math.com production. How do i solve these logarithms? logx 81 = 4 (....^ the x is a base) log64 8 = x (....^ the 64 is a base) 25+5log2 x = 10 (...........^ the 2 is a base) -4+12logx 3 = 2 (............^ the x is a base)

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