-3
1. Add -1.4 to each side.
2. Divide by 0.7 on each side.
Hope this helps
The answer I got was x= 21/2
They will see each other every 30 days but won't every 15 days
180cm. The square is 6 x 6 = 36 and the triangles = 12 x 6 = 72 and then divide it by 2 = 36 multiply that by 5 and you get 180cm
