Question

Solve the equation.
2^(x) +3.2^(x+2) + 2^(x+3) = 84

Answer 1

\[2^x +3*2^{x+2} + 2^{x+3} = 84\]
\[2^x(1+3*2^2+2^3)=84\]
\[2^x(21)=84\]
\[2^x=4\]
\[x=2\]

Answer 2

x=2

Answer 3

are u sure that's correct?

Answer 4

coz it's 3.2

Answer 5

I read it as 3*2 o.o

Answer 6

it is 3*2

Answer 7

then it's correct.