Teddy, Karzan and Karl went to the store to buy candy. Teddy spent $21 on 3 pieces of candy, Karzan spent $63 on 21 pieces of ca
2 answers:
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For this case we have the following system of two equations with two unknowns:
Adding both equations we have to eliminate the variable "x":
Adding common terms, keeping in mind that different signs are subtracted and the sign of the major is placed:
Answer:
Option A