50 point for the first person to answer this. Starting out with 5 because you people keep trying to steal my points. Question attached below so stop saying what?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality

2pointswhich of the following appear in the diagram below? check all that apply.d a. zcdeов. сеo c. aéo d. zdce