document.write( "Question 439510: a railway half ticket costs half the full fare and the reservation charge for the distance covered. for a journey of 12km the charge paid is 89 and for a journey of 20km the charge paid is 145. what will a person have to pay for travelling a distance of 30km? \n" ); document.write( "
Algebra.Com's Answer #303760 by rwm(914)\"\" \"About 
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h=t/2+r*d
\n" ); document.write( "89=t/2+r*12
\n" ); document.write( "145=t/2+r*20
\n" ); document.write( "x=t/2+r*30
\n" ); document.write( "r=7
\n" ); document.write( "t=10
\n" ); document.write( "x=215
\n" ); document.write( "30 km costs 215
\n" ); document.write( "
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