12 is 2/3 of what number?

18

Step-by-step explanation:

18 ÷ 3 = 6

6 ⋅ 2 = 12

Therefore, 12 is 2/3 of 18.

there are no short passages to look at

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk