3×6/8 reduce is 3× 3/4= 3/1×3/4=9/4 or 2 1/4
Multiply 6 by 60 then divide by two which will get you 180.
first make two triangles using M , so there iwll be 90-45-45, and 30-60-90 then use the side rules of those special triangles
-12 n - 24 = -12 (n+2)
-12 (n+2) is the answer