document.write( "Question 1088702: The cost of a pen is 30 cents more than the cost of a pencil. Jackson spent $4.30 when he bought five pens and two pencils. Can you calculate the individual cost of a pencil and pen? \n" ); document.write( "

Algebra.Com's Answer #703007 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+x+\"$ = the cost of a pencil ( in cents )
\n" ); document.write( " $\"+x+%2B+30+\"$ = the cost of a pen ( in cents )
\n" ); document.write( "---------------------
\n" ); document.write( " $\"+5%2A%28+x+%2B+30+%29+%2B+2x+=+430+\"$ ( in cents )
\n" ); document.write( " $\"+5x+%2B+150+%2B+2x+=+430+\"$
\n" ); document.write( " $\"+7x+=+280+\"$
\n" ); document.write( " $\"+x+=+40+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+x+%2B+30+=+70+\"$
\n" ); document.write( "A pen costs 70 cents
\n" ); document.write( "A pencil costs 40 cents
\n" ); document.write( "-------------------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+5%2A%28+x+%2B+30+%29+%2B+2x+=+430+\"$
\n" ); document.write( " $\"+5%2A70+%2B+2%2A40+=+430+\"$
\n" ); document.write( " $\"+350+%2B+80+=+430+\"$
\n" ); document.write( " $\"+430+=+430+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

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