First find the distance Matt climbs in 7 minutes: 6 feet/minute * 7 minutes = <<6*7=42>>42 feet
Then find the distance Jason climbs in 7 minutes: 12 feet/minute * 7 minutes = <<12*7=84>>84 feet
Then subtract the distance Matt climbs from the distance Jason climbs to find the difference: 84 feet - 42 feet = <<84-42=42>>42 feet
#### 42