Two adults and three children cost 64 dollars. One adult and two children cost 38 dollars. What do one adult and one child cost together?
Answer and explanation
Correct answer: A. 26 dollars
Answer: 26 dollars. Why not the others: Check: 2(14) + 3(12) = 64. Other totals fail the second equation.
- Step 1: Let adult = , child = : and .
- Step 2: From the second, . Substitute: , so .
- Step 3: Then ; together 14 + 12 = 26.
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