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Denise fired a silver rocket and a gold rocket at the same time. The rockets exploded into $20$ stars in total. The gold rocket exploded into $6$ more stars than the silver one. How many stars did the gold rocket explode into? (2021 Math Kangaroo Problem, Level 3-4, Question \#7) 
Overseas Competition->Knowledge Point->Calculation Modules
The silver rocket exploded $(20-6)\div2=7$ stars, and the gold rocket exploded $20-7=13$ stars. 