when the positive integers a,b,and c are divided by 13 the respective remainders are 9,7 and 10 .find the remainder when a+2b+3c is divided by 13
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22÷13=9 remainder 9
20÷13=7 remainder 7
23÷13=10 remainder 10
2a+2b+3c
2×13+2×20+3×23=130
130÷13=10 ans.
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