1 - Tell which of the following is a linear inequality in two variables. (Refer to Example A and solution on page 3) Examples: YES .a) 2x + 3y < 18 NO .b) 3x - 57 NO . c) x = 12-2y 1) 5x 2 12 + y 2) 6x - 2y = 20 3)-2x = 8 + 3y 4) 9 - 6x s 18 5) 4(x + 7) > 2y