document.write( "Question 1025092: a dealer buys 120 pens, x of them cost R3 each and the others cost R4 each. how do I express in terms of x the number of pens he buys for R4 \n" ); document.write( "

Algebra.Com's Answer #640416 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
The 2 groups of pens are:
\n" ); document.write( " $\"+x+\"$ pens
\n" ); document.write( " $\"+120+-+x+\"$ pens
\n" ); document.write( "-----------------
\n" ); document.write( " $\"+3x+\"$ is the cost of $\"+x+\"$ pens
\n" ); document.write( " $\"+4%2A%28+120+-+x+%29+\"$ is the cost of the remaining pens
\n" ); document.write( "-----------------
\n" ); document.write( " $\"+3x+%2B+4%2A%28+120+-+x+%29+\"$ is the total cost of all 120 pens \n" ); document.write( "

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