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Name : Score : Logarithmic Equation Solve each logarithmic equation. 1) log2 (x+3) + log2 (x–3) = log2 91 x= 3) log5 (x+5) – log5 2 = log5 50 x= 5) 2 log8 x + log8 2 = log8 72 x= 7) log2 6 + log2 (1–x) = 2 log3 6 x= 9) log4 (x+4) + log4 5 = log4 (3x–2) x= 2) log6 x3+ log6 3 = 4 log6 3 x= 4) log3 (73+x) = log3 16 + 2 log3 2 x= 6) log2 (x–4) – log2 4 = 5 log2 2 x= 8) log3 7 = log3 (x+41) – log3 2 x= 10) log6 x – log6 3 = 2 log6 5 x= Printable Math Worksheets @ www.mathworksheets4kids.com Name : Score : Answer key Solve each logarithmic equation. 1) log2 (x+3) + log2 (x–3) = log2 91 x= 10 3) log5 (x+5) – log5 2 = log5 50 x= 95 5) 2 log8 x + log8 2 = log8 72 x= 6 7) log2 6 + log2 (1–x) = 2 log3 6 x= –5 9) log4 (x+4) + log4 5 = log4 (3x–2) x= –11 2) log6 x3+ log6 3 = 4 log6 3 x= 3 4) log3 (73+x) = log3 16 + 2 log3 2 x= –9 6) log2 (x–4) – log2 4 = 5 log2 2 x= 132 8) log3 7 = log3 (x+41) – log3 2 x= –27 10) log6 x – log6 3 = 2 log6 5 x= Printable Math Worksheets @ www.mathworksheets4kids.com 75