It is not.
400 decimeters = 4,000 cm
4,000 cm = 40 m
Hello,
3(2m-9+6m)=3m+29-7m
==>3(8m-9)=-4m+29
==>24m+4m=29+27
==>28m=56
==>m=2
Answer B
Do you have a picture for this problem? There are multiple different ways to solve this problem but I'll need a picture to help you.