Answer:
x= x-4 + x-3
Explanation:
x or Mmin(monthly minutes)
T=Tom
S=Sage
T=7min
S=4min+3min=7min
T Mmin(monthly minutes) or x= x-7
S Mmin(monthly minutes) or x= x-4 + x-3
x=number of talk mnutes
Sage uses 7 minutes = x-7
Tom uses 4 and 3 minutes = x-4-3 = x-7
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