Question

Answer 1

`-> 2^x + 2^x . 3 = 288`

`-> 2^x . 9 = 288`

`-> 2^x = 32`

`=> x = 5`

Answer 2

`2^x + 2^(x+3) = 288`

`<=> 2^x + 2^x * 2^3 =288`

`<=> 2^x*( 1+8) = 288`

`<=> 2^x * 9 =288`

`=> 2^x = 288/9 =32`

`=> 2^x = 2^5`

`=> x=5`