Question

Cрочно!РЕШИТЬ УРАВНЕНИЕ
2^(x+4) - 2^x=120

Answer 1

2^x*2^4 - 2^x = 120
16*2^x - 2^x = 120
2^x( 16 - 1) = 120
2^x *15 = 120
2^x *15 = 15*8
2^x = 8 
2^x = 2^3 ==> x = 3