"george wants to sign up for a new mobile phone plan. the mobile phone company offers george two plans. mobile green has a monthly instalment of $20 plus an additional charge of 10 cents per minute of talk/text. mobile blue has a monthly instalment of $40 with an additional charge of 5 cents per minute of talk/text. at what dollar amount is the cost for the two plans the same for the same amount of minutes? "
okay so equations are; y=0.10x+20.0 and y=0.05x+40. what do i do to find out the actual answer to the question, "at what dollar amount is the cost for the two plans the same for the same amount of minutes? "