2 5 x 4 7 12 1 July 8, 2019 16 32 64 128 7 12 x 5 18 2 4 9 1 1 15 x 5 2 5 x 4 7 12 2 5 x 12 17 20 y 9 7 4 12 * 4 x 5 * 4 x 7 * 2 12 4 1 2 2 5 6 x 1 7 12 2 4(5x+1)=7 4-(5-12x)
