Please help I would super appreciate it thank you so much

Multiplying an even number of negative numbers gives an answer that is choose from:

Which statement is true? the given sides and angles cannot be used to show similarity by either the sss or sas similarity theorems. the given sides and angles can be used to show similarity by the sss similarity theorem only. the given sides and angles can be used to show similarity by the sas similarity theorem only. the given sides and angles can be used to show similarity by both the sss and sas similarity theorems.

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