3/4 of the students at Bismarck High are less than 16 years old. If there are 1200 students at the school, how many of them are
1 answer:
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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