document.write( "Question 1095931: the total cost of 2 books and 7 pens is 79 rs and the total cost of 7 books and 5 pens is 77 rs. find the cost of1 book and 2 pens... \n" ); document.write( "
Algebra.Com's Answer #710428 by MathTherapy(10552)\"\" \"About 
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\n" ); document.write( "the total cost of 2 books and 7 pens is 79 rs and the total cost of 7 books and 5 pens is 77 rs. find the cost of1 book and 2 pens...
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