Answer:
adult  $10  Children $15
Step-by-step explanation:
4A + 6C = 130
10A + 12C = 280
Multiply the first by -2 to eliminate C
-8A -12C = - 260
10A +12C = 280
  ADD BOTH
2A = 20
A=10 Â Â ($10 per adult)
  40+6C = 130
6C = 90
C=15 (15 per child)
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