Answer:
14 ( c ) = Caleb's
12 ( c + 10 ) = Sergio's
Explanation:
Caleb lifted 14 boxes so you multiply 14 by c which is the weight of each box and for Sergio he lifted 12 boxes although his weighed 10 pounds more so you add 10 to c which would equal c + 10 multiplied by 12
hope this did not confuse you