8x 12 2 4x 6 July 8, 2019 16 32 64 128 6 (- 8x 4 )= 12 (- 4x 2 2 4x 8x )- 12 6x 3 4 − 1 4 8x 12 − 1 2 4x 6 −1/4(8x + 12) = −1/2(4x + 6) how many solutions 2^x + 8^x = 130