book Maths Puzzle Numerical Ability

hello ...can you please help me with the following problems?
Thanks soo much:)

Solve this equation.
2^(x + 1) = 8^(1 - 2x)
x =

Solve this equation.
3^(2x) + 3^(x + 1) -

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book Other Question

3 and -1....write that into a quadratic equation that correspnds to each pair of roots?(assume there is no vertical shrink or stretch) then write the equation in factored form and a rectangle has a perimeter of 68 inches. its legnth is 2 inches less than 3 times a width. what are the legth and width of the rectange