what is the answer to the question imma be posting a lot of math stuff on here cause I'm really bad at math.

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

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex

Find │7│. a. 1 over 7 b. –7 c. 7 asap i always mark brailiest who me so