document.write( "Question 1089567: Hey please help me with this question: An orange cost 8 cents more than an apple. If I buy 7 apples and 8 oranges the total cost is $4.24. Find the cost of one Apple. \n" ); document.write( "
Algebra.Com's Answer #703909 by math_helper(2461)\"\" \"About 
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Let a = cost of apple, in cents
\n" ); document.write( "Let r = cost of orange, in cents\r
\n" ); document.write( "\n" ); document.write( "r = a + 8 (1)
\n" ); document.write( "7a + 8r = 424 (2)\r
\n" ); document.write( "\n" ); document.write( "Substitute \"a+8\" from (1) into (2):\r
\n" ); document.write( "\n" ); document.write( "7a + 8(a+8) = 424
\n" ); document.write( "15a + 64 = 424
\n" ); document.write( "15a = 360
\n" ); document.write( "a=24 —> r=24+8 = 32\r
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\n" ); document.write( "Ans: Apples cost 24 cents each (and Oranges cost 32 cents each.)
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\n" ); document.write( "Check:
\n" ); document.write( " 32 = 24+8 (ok)
\n" ); document.write( " 7(24) + 8(32) = 168 + 256 = 424 = $4.24 (ok)\r
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