Answers

2016-03-03T10:43:42+05:30
Let the area code of Montana be X and the area code of Idaho be Y .
X + Y = 614 - ( 1 )
X - Y = 198 - ( 2 )
by adding both ( 1 ) and (2 )
2 X = 812
X = 406
by substituting the value of X in eq . ( 2 )
X - Y = 198
406 - Y = 198
Y = 208
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