Question

Найдите y-x, если известно

Answer 1

$2^{x+1} =4^{y}\\\\2^{x+1}=2^{2y}\\\\x+1=2y\\\\x-2y=-1\\\\-\left \{ {{x+y=-4} \atop {x-2y=-1}} \right.\\ -------\\3y=-3\\\\y=-1\\\\x=-4-y=-4-(-1)=-4+1=-3$

y - x = - 1 - (- 3) = - 1 + 3 = 2

y - x = 2