B. Solve each system 3) y = 4x - 9 y = x - 3 7) 8x - 6y=-20 -16x + 7y = 30 4) 4x + 2y = 10 x-y = 13 C. Solve each system by elimination. 8) 6x 12y = 24 -x-6y=4 by substitution. 1 Ans Ans. Ans Ans ][​