A chihuahua, pitbull, and great dane weigh a combined weight of 439 pounds. The pitbull weighs 3 times as much as the chihuahua.  The great dane weighs 10 more pounds than triple the pitbull.  How much does the great dane weigh?
Let x represent the weight of the chihuahua
Pitbull:3x
Great dane:10+3(3x)=10+9x
Total:x+3x+10+9x=439
13x+10=439
13x=429
x=<<33=33>>33 pounds
Great dane:10+9(33)=307 pounds
#### 307