Logarithmic Equation Page 2
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Answer key
Solve each logarithmic equation.
1) log 2x = log 68
2) 2 log 5 = log (x+46)
34
–21
x =
x =
3) log (x+7) = 3 log 3
4) log (3x+7) = log (4x+15)
x =
20
x =
–8
5) log (7x–3) = log (5x+55)
6) log 48 = log (x+4)
29
44
x =
x =
7) log (2x+17) = log (x+3)
8) log (3x–2) = log 25
–14
9
x =
x =
9) log (x+5) = 4 log 2
10) log (x+6) = log (2x+24)
x =
11
x =
–18
11) log (1– 4x) = 2 log 7
12) log (3x–15) = log (x+67)
–12
41
x =
x =
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