Question

para qual valor de x a equação exponencial é verdadeira?
2X+5=8x-1
a)3
b)5
c)-2
d)4

Answer 1

$2^x^+^5 = 8^x^-^1\\\\\ 2^x^+^5 = 2^3^(^x^-^1^)\\\\\ x+5 = 3(x-1)\\\\ x+5 = 3x-3\\\\\ x-3x = -3-5\\\\ -2x = -8\\\\ x = \frac{8}{2}\\\\ \boxed{x=4}$