Question

ecuación 5^x+1-10.5^x-1=15

Answer 1

$5^{x+1} - 10.5^{x-1} = 15$

$5^{x} .5 - \frac{10.5^{x} }{5} = 15$

$5^{x} .5- 2.5 ^{x} = 15$

$5^{x} (5-2)= 15$

$5 ^{x} (3) = 15$

$5^{x} = \frac{15}{3}$

$5^{x} = 5$

x = 1