Answer:
24
Step-by-step explanation:
sorry if incorrect
T= $100 + $25
42=x+(x+3)+x+(x+3)
42=2x+(2x+6)
36=4x
9=x
l=9
w=12
check:9+9=18+24=42
5+5=10
5x2=10
Together, they equal 20.