$- 8 left x 1 right ) 2x =- 32 July 8, 2019 16 32 64 128 $- 8 left x 1 right )+ 2x =- 32 2^x + 8^x = 130 3 left( 1 - x right) + 5 left( x + 2 right) = 1 - 4x
