Question

what is solution of equation
$3(2^{x}+1)-2^{x+2}+5=0$

tell me its explanation also
answer is 3

Answer 1

$3.2 {}^{x} + 3 - 2 {}^{x + 2} + 5 = 0 \\ 3.2 {}^{x} + 3 - 2 {}^{x} 2 { }^{2} + 5 = 0 \\ 3.2 {}^{x} + 3 - 2 {}^{x}.4 + 5 = 0 \\ put \: {2}^{x} = t \\ 3t +3 - 4t + 5 = 0 \\ t = 8 \\ x = 3$