no.13
2^(3x+5) = 1/16
2^(3x+5) = 2^(-4)
3x+5 = -4
3x = -4-5
3x = -9
x = -9/3 = -3 (C)
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no.13
2^(3x+5) = 1/16
2^(3x+5) = 2^(-4)
3x+5 = -4
3x = -4-5
3x = -9
x = -9/3 = -3 (C)