document.write( "Question 861739: a computer shop displays a total of 50 types A and type B mice. the cost of type A mouse is Rs. 6 and that of a type B mouse is Rs.13. if the total cost of both types of mice is Rs. 433,find the number of type A mice displayed. \n" ); document.write( "

Algebra.Com's Answer #519197 by mananth(16946) $\"\"$ $\"About$

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x= number of Rs. 6 mouse
\n" ); document.write( "y= number of Rs. 13 mouse
\n" ); document.write( "
\n" ); document.write( "1 x + 1 y = 50 .............1
\n" ); document.write( "Total value
\n" ); document.write( "6 x + 13 y = 433 .............2
\n" ); document.write( "Eliminate y
\n" ); document.write( "multiply (1)by -13
\n" ); document.write( "Multiply (2) by 1
\n" ); document.write( "-13 x -13 y = -650
\n" ); document.write( "6 x + 13 y = 433
\n" ); document.write( "Add the two equations
\n" ); document.write( "-7 x = -217
\n" ); document.write( "/ -7
\n" ); document.write( "x = 31
\n" ); document.write( "plug value of x in (1)
\n" ); document.write( "1 x + 1 y = 50
\n" ); document.write( "31 + y = 50
\n" ); document.write( " y = 50 -31
\n" ); document.write( " y = 19
\n" ); document.write( " y = 19
\n" ); document.write( "x= 31.00 number of Rs. 6 mouse
\n" ); document.write( "y= 19.00 number of Rs. 13 mouse
\n" ); document.write( "m.ananth@hotmail.ca
\n" ); document.write( " \n" ); document.write( "

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