Answer:
(B). 8 units
Step-by-step explanation:
we have:
10*(9x-1+10)=9(9+11)
10(9x+9)=9*20
9(x+1)=9*20/10
x+1=18/9
x+1=2
x=2-1
x=1
Now
RS:9×1-1=8
