System of equations confusing.  TOPIC_SOLVED

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System of equations confusing.

Postby Byteofserial on Wed Jun 05, 2013 12:46 am

Currently working on system of equations. A certain word problem is confusing me.

A school made $1220 on its fundraiser by washing cars and recycling can.
Students were paid an average of $55 per car wash, and 35 for picking up cans.
There are four less people washing cars than picking up cans.
Write a system of equations to determine how many car washers there are.
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Re: System of equations confusing.  TOPIC_SOLVED

Postby jg.allinsymbols on Wed Jun 05, 2013 1:01 am

Byteofserial wrote:Currently working on system of equations. A certain word problem is confusing me.

A school made $1220 on its fundraiser by washing cars and recycling can.
Students were paid an average of $55 per car wash, and 35 for picking up cans.
There are four less people washing cars than picking up cans.
Write a system of equations to determine how many car washers there are.


Let x=amount of car washers
Let y= amount of can pickers

four less people washing cars than picking cans,

Account for the "how much school made":
and by substitution,
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