I believe the answer is 15 because if you divide 270/18 you get 15 <span />
9w - 7 = 5
9w= 5+7
9w=12
w= 4/3 or 1.33
Can you post your middle school questions in the middle school area...
9 4/5 - 2 3/10 = X
9 8/10 - 2 3/10 = X
7 5/10 = X
7 1/2 is simplest form
The answer is 64, because the amount is doubled each day.