20-9.80=?
5.-2.60=?
Find out. Solve them.
Answer:
here
Step-by-step explanation:
from left to right
81, 27, 9, 3, 1
X=7
Perimeter =2 x(length+width)
2(3x-9+x)=38
4x-9=19
4x=28
x=7
