To different companies offer online gaming subscriptions. Company A charges $75 upfront and then $20 per month. Company B does not charge an upfront fee, but charges $35 per month. After how many months will the two companies charge the same amount?

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i worked it out for you. set them equal and solve for,x
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1:
Company A-95
Company B-35
2:
Company A: 115
Company B: 70
3:
Company A: 135
Company B: 105
4: 
Comapny A: 155
Company B: 140
5:
Company A: 175
Company B: 175

Your answer is they will charge the same amount after 5 months