document.write( "Question 831795: hello I am helping my 7th grader with a math project but I have forgotten how to do this problem: if he is buying a t shirt for $5 and he sells it for $12 how do we equate the percentage of his markup? please and thank you very much \n" ); document.write( "
Algebra.Com's Answer #501639 by rothauserc(4718)\"\" \"About 
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let x be the percent markup, then we have
\n" ); document.write( "5 + 5*(x/100) = 12
\n" ); document.write( "subtract 5 from both sides of =
\n" ); document.write( "5*(x/100) = 7
\n" ); document.write( "multiply both sides of = by 100
\n" ); document.write( "5x = 700
\n" ); document.write( "x = 140
\n" ); document.write( "the markup is 140%
\n" ); document.write( "
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