Question

resolva em R as esquaçoes a)25 x+2=125 x+5 b)5 2x-1=1

Answer 1

a) $25^{(x+2)} = 125^{(x+5)}$
$5^{(2x+4)} = 5^{(3x+15)}$
$2x + 4 = 3x + 15$
$2x - 3x = 15 - 4$
$-x = 11 .(-1)$
$x = -11$

b) $5^{(2x-1)} = 1$
$2x - 1 = 0$
$2x = 1$
$x = \frac{1}{2}$