Timothy and his brothers are selling lemonade and cookies to raise funds for a camping trip. Paul bought two cups of lemonade and two cookies for $3 and Nancy bought three cookie and two cups for $4.00. What is the cost of a cup of lemonade?

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Answer 1 · 2018-03-07T19:19:56

$1.00

let lemonade be "L" and cookie be "C"

form a subtraction question based on what we know

#3L + 2C = 4#
#2L + 2C = 3#

#1L + 0C = 1#

#:. L =1#

sub in to verify

#3L + 2C = 4#
#3(1) + 2C = 4#
#3 + 2C = 4#
#2C = 1#

a cookie is 50 cents