Question

2^x+2^x+3=144

Answer 1

2^x + 2^{x + 3} = 144

2^x . 1 + 2^x . 2³ = 144

2^x . 1 + 2^x . 8 = 144

2^x . ( 1 + 8 ) = 144

2^x . 9 = 144

2^x = 144 : 9

2^x = 16

2^x = 2⁴

=> x = 4

Answer 2

2^x+2^x+3=144

=> 2x(1+8)=144

=>2x=144:9

=>2x=16

=>x=8