document.write( "Question 144849: a group of 80 people attend a ball game. there were four times as many children as adults in the group. write a system of equations that you could use to set up this problem, where a is the number of adults and c is the number of children in the group. solve the system of equations for c, the number of childern in the group \n" ); document.write( "
Algebra.Com's Answer #105561 by shahid(44)\"\" \"About 
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80 people are there so first equation is
\n" ); document.write( "a+c=80....(1)
\n" ); document.write( "second equ formed by condition is
\n" ); document.write( "c=4a ....(2) subtacting both equations
\n" ); document.write( "a=80-4a
\n" ); document.write( "a+4a=80
\n" ); document.write( "5a=80
\n" ); document.write( "a=80/5
\n" ); document.write( "a=16 so c=4(16)=64 there were 64 children in the group
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