Question 1179499
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The given information compares the numbers of messages from both Regina and Gabriel to the number sent by Felipe.  So use the number sent by Felipe as the variable.<br>
let x = # sent by Felipe
then x+7 = # sent by Regina
and 4x = # sent by Gabriel<br>
The total number of messages was 103:<br>
(x)+(x+7)+(4x) = 103<br>
Solve using basic algebra....<br>