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5²^x + 3 = 5^x - 1
2x + 6 = x - 1
2x - x = - 1 - 6
x = - 7
5^2(x + 3) = 5^(x - 1)
2(x + 3) = x - 1
2x + 6 = x - 1
2x - x = -1 - 6
x = -7