Answer:
7
Step-by-step explanation:
get the x on the same side.
subtract 2x from both sides
30=3x+9
then get the variables on one side by themselves. subtract 9 from both sides.
21=3x
now divide by 3 on both sides.
there's your answer.
The perimeter is 30 units
I don't think so.........
Well what is the problem ?
Answer:
7.33
Step-by-step explanation: