Answer:
Dale: $360
Tammy: $120
Brian:$127
Tammy,Brian and Dale have $127 altogether.
Dale's rule: 3× what Tammy has (3y y=Tammy's money). 120 × 3=$360
Tammy's Rule: $7 less than Brian (b-7 b= Brian's money). 127 - 7= $120
Brian has $127 in his wallet because there is no description of what changes in his money.
