document.write( "Question 1079809: A detective has a 1/7 chance of solving the case. His expenses will run up to $630. How much does he have to charge his client to break even. He works on contingency basis. No solution, no compensation.
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Algebra.Com's Answer #694078 by Boreal(15235)\"\" \"About 
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E(x)=0=(1/7)*x-(6/7)*630, where x is what he has to charge.
\n" ); document.write( "0=(x/7)-540
\n" ); document.write( "(x/7)=540
\n" ); document.write( "x=$3780.
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