document.write( "Question 1114775: Hi
\n" ); document.write( "the total cost of 20pens and 8 rulers is 32 dollars. \r
\n" ); document.write( "\n" ); document.write( "Find the cost of 25pens and 10 rulers.\r
\n" ); document.write( "\n" ); document.write( "thanks \n" ); document.write( "

Algebra.Com's Answer #729683 by ikleyn(52865) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "20p + 8r = 32   dollars.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Divide by 4 both sides:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "5p + 2r = 8   dollars.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Multiply by 5 both sides:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "25p + 10r = 40  dollars.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Answer.  25 pens and 10 rulers cost 40 dollars.\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( "Solved.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "-----------------\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The lesson to learn from this solution:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "

\r\n" );
document.write( "    You do not need solving the system of equations in this case.\r\n" );
document.write( "\r\n" );
document.write( "    You  simply need to multiply the given data by the factor of  .\r\n" );
document.write( "\r\n" );
document.write( "    That is ALL the problem wants of you.\r\n" );
document.write( "

\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );