Question

**ILL GIVE BRAINLIEST! PLEASE HELP !! :)**

Answer 1

72-54 =2a
A=9
A+54= 3a+b
63=3a+b
63= 3(9) +B
B=36
A+B =C
9+36=45
C=45
A+2C=4a+2D
9+ 2(45) = 4(9) + 2D
63=2D
D=31.5
A+D=F
9+31.5=F
F= 40.5