Question 322258
Plan A charges $25 per month for unlimited calls. 
Plan B charges a monthly fee of $13 with a charge of $0.06 per local call. 
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Let the number of calls made be x to reach a bill of $25. Above x calls Plan A becomes a better deal.
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0.06x+13=25
0.06x=12
x= 12/0.06
x=200 calls