Which of the following is not a linear equation in one variable? (a) 3x + 2 = 0 (b) 2y – 4 = y (c) x + 2y = 7 (d) 2(x – 3) + 7 = 0

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.