2^(x - 1)/4 = 4^x·16·2^(3·x)
2^(x - 3) = 2^(2·x)·2^4·2^(3·x)
2^(x - 3) = 2^(5·x + 4)
x - 3 = 5·x + 4---> x = - 7/4
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5^(x + 2)·25 = 5^(2·x - 3)/125
5^(x + 2)·5^2 = 5^(2·x - 3)/5^3
5^(x + 4) = 5^(2·(x - 3))
x + 4 = 2·(x - 3)
x + 4 = 2·x - 6---> x = 10
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6^(2·x - 1)·36 = 216^x·6^x/6
6^(2·x - 1)·6^2 = 216^x·6^x/6
6^(2·x - 1)·6^2 = 6^(3·x)·6^x/6
6^(2·x + 1) = 6^(4·x - 1)
2·x + 1 = 4·x - 1---> x = 1