document.write( "Question 877606: A preschool playground has both bicycles and trycicles there is a total of 30 seats and 70 wheels how many bicycles are there \n" ); document.write( "
Algebra.Com's Answer #529435 by jim_thompson5910(35256)\"\" \"About 
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Hint:\r
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\n" ); document.write( "\n" ); document.write( "If b is the number of bicycles and t is the number of tricycles, then we have this system of equations\r
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\n" ); document.write( "\n" ); document.write( "\"b%2Bt=30\" (each has 1 seat, so they must add to 30 total seats)
\n" ); document.write( "\"2b%2B3t=70\" (2 wheels per bike + 3 wheels per tricycle = 70 wheels total)
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