document.write( "Question 850424: The cost of an orange and an apple is 72 cents. The cost of an apple and a plum 36 cents. The cost of an orange and plum is 62 cents. What would the cost of 2 apples, 2 oranges, and 1 plum?
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Algebra.Com's Answer #512132 by josmiceli(19441) $\"\"$ $\"About$

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(1) $\"+o+%2B+a+=+72+\"$
\n" ); document.write( "(2) $\"+a+%2B+p+=+36+\"$
\n" ); document.write( "(3) $\"+o+%2B+p+=+62+\"$
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\n" ); document.write( "There are 3 unknowns and 3 equations
\n" ); document.write( "so it is solvable
\n" ); document.write( "Subtract (2) from (1)
\n" ); document.write( "(1) $\"+o+%2B+a+=+72+\"$
\n" ); document.write( "(2) $\"+-p+-+a+=+-36+\"$
\n" ); document.write( " $\"+o+-+p+=+36+\"$
\n" ); document.write( "Add this result to (3)
\n" ); document.write( " $\"+o+-+p+=+36+\"$
\n" ); document.write( "(3) $\"+o+%2B+p+=+62+\"$
\n" ); document.write( " $\"+2o+=+98+\"$
\n" ); document.write( " $\"+o+=+49+\"$
\n" ); document.write( "and
\n" ); document.write( "(3) $\"+o+%2B+p+=+62+\"$
\n" ); document.write( "(3) $\"+49+%2B+p+=+62+\"$
\n" ); document.write( "(3) $\"+p+=+13+\"$
\n" ); document.write( "and
\n" ); document.write( "(1) $\"+o+%2B+a+=+72+\"$
\n" ); document.write( "(1) $\"+49+%2B+a+=+72+\"$
\n" ); document.write( "(1) $\"+a+=+23+\"$
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\n" ); document.write( "1 apple costs 23 cents
\n" ); document.write( "1 orange costs 49 cents
\n" ); document.write( "1 plum costs 13 cents
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\n" ); document.write( "2 apples cost 46 cents
\n" ); document.write( "2 oranges cost 98 cents
\n" ); document.write( "1 plum costs 13 cents
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\n" ); document.write( "The sum of the costs is:
\n" ); document.write( " $\"+46+%2B+98+%2B+13+=+157+\"$
\n" ); document.write( "$1.57 total\r
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