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At Joe's Market, three oranges and one apple cost $1.86, and two oranges and three apples cost $2.15. What is the cost of one apple?
At Joe's Market, three oranges and one apple cost $1.86, and two oranges and three apples cost $2.15. What is the cost of one apple?
Asked by: USER7764
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169 Answers
Answer (169)
o=orange
a=apple
equation 1
3o+a=$1.86
a=$1.86-3o
use a=$1.86-3o in equation 2
equation 2
2o+3a=$2.15
2o+3($1.86-3o)=$2.15
2o+$5.58-9o=$2.15
$5.58-7o=$2.15
$5.58=$2.15+7o
$3.43=7o
$0.49=o
then use $0.49=o for equation 1.
equation 1
3($0.49)+a=$1.86
$1.47+a=$1.86
a=$0.39
so an apple is $0.39.
a=apple
equation 1
3o+a=$1.86
a=$1.86-3o
use a=$1.86-3o in equation 2
equation 2
2o+3a=$2.15
2o+3($1.86-3o)=$2.15
2o+$5.58-9o=$2.15
$5.58-7o=$2.15
$5.58=$2.15+7o
$3.43=7o
$0.49=o
then use $0.49=o for equation 1.
equation 1
3($0.49)+a=$1.86
$1.47+a=$1.86
a=$0.39
so an apple is $0.39.