It is: 18-3D
18-(3*d) or 18-3d
A hexagonal based prism.
L-Shaped Prism & Hexagonal Pyramid
12d - 9 = 15d + 9 Subtract 15 d from both sides: -3d - 9 = 9 Add 9 to both sides: -3d = 18 Divide both sides by -3: d = -6
18-d3
18
23-5-3d = 36 -3d = 36+5-23 -3d = 18 d = -6
As an expression it is: 18-3d
its a 18
no
There is not a definite name for a 3D figure with 18 sides.It is possible that it is something else - but the information to test this is not provided.
It is: 18-3D
18-(3*d) or 18-3d
Octadecadron
you have to be 18 and up
8d = 5d+18 8d-5d = 18 3d = 18 d = 6