document.write( "Question 307216: Customers of a phone company can choose between two service plans for long distance calls. The first plan has a $35 one-time activation fee and charges 7 cents a minute. The second plan has no activation fee and charges 12 cents a minute. After how many minutes of long distance calls will the costs of the two plans be equal?
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Algebra.Com's Answer #219842 by mananth(16946) $\"\"$ $\"About$

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Customers of a phone company can choose between two service plans for long distance calls. The first plan has a $35 one-time activation fee and charges 7 cents a minute. The second plan has no activation fee and charges 12 cents a minute. After how many minutes of long distance calls will the costs of the two plans be equal? \r
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\n" ); document.write( "\n" ); document.write( "Let the number of minutes after which the they become equal be x\r
\n" ); document.write( "\n" ); document.write( "Convert call charges from cents to dollars\r
\n" ); document.write( "\n" ); document.write( "first plan will cost 0.07x + 35
\n" ); document.write( "Second plan will cost 0.12x\r
\n" ); document.write( "\n" ); document.write( "0.07x +35 = 0.12x\r
\n" ); document.write( "\n" ); document.write( "0.07x-0.12x= -35\r
\n" ); document.write( "\n" ); document.write( "-0.05x=-35\r
\n" ); document.write( "\n" ); document.write( "x=-35/-0.05\r
\n" ); document.write( "\n" ); document.write( "x=700 minutes\r
\n" ); document.write( "\n" ); document.write( "after 700 minutes they will become equal \n" ); document.write( "

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