Which equation has solution x = -3?
a. 2x - 7 = -1
b. 3x 8 = 1
c. 1 2 x 8 = 10
d. 1 2 (2x - 6) = -6?

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.