SOLUTION: This month Jenny bought six less than twice the number of gallons of gasoline for her car than she did last month. If the total number of gallons of gasoline that Jenny bought this

Algebra ->  Equations -> SOLUTION: This month Jenny bought six less than twice the number of gallons of gasoline for her car than she did last month. If the total number of gallons of gasoline that Jenny bought this      Log On


   

Question 697777: This month Jenny bought six less than twice the number of gallons of gasoline for her car than she did last month. If the total number of gallons of gasoline that Jenny bought this month and last month is 150, how many gallons of gasoline did Jenny buy this month?
n is gasoline.
n-y=150
2n-6=150
(6n-6y=900)-(2n-6y=150)
4n=750
n=187
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +n+ = number of gallons of gasoline she bought last month
given:
This month:
She bought +2n+-+6+ gallons
+2n+-+6+%2B+n+=+150+
+3n+=+156+
+n+=+52+
This month, she bought:
+2n+-+6+=+2%2A52+-+6+
+2n+-+6+=+104+-+6+
+2n+-+6+=+98+
She bought 98 gallons this month