Ineed with 19 and if you can tell me step by step or show your work !

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

The number of 8th graders who responded to a poll of 6th grade and 8 th graders was one fourtg of the number of 6th graders whi responded if a total of 100 students responddd to the poll how many of the students responded were 6 th graders

Which equation can be solved to find x the measure of jk in the apex