In order to do this you have to substitute b with 9 and get 3a+9=54, now subtract 9 from both sides to leave a by itself and get 3a=45, now divide 3 in both sides to leave a by itself and get a=15
Hope this helps
When x=2
20-6 = 14
when x=3
20-9 = 11
the answer is x=2 will give you the larger value
Answer:
Step-by-step explanation:
Don't afraid of parameter!
The area is 3500.
The pic shows the process. Hope you can understand.