13. 4x 1 = 5(x - 3y) - 6 3(x 6y) 4=9y 19 July 8, 2019 16 32 64 128 13. 4x + 1 = 5(x - 3y) - 6 3(x+6y)+4=9y+19 1 5x ^ - 3 * y ^ - 4 * 6x ^ 3 * y ^ 5