The solution represents the initial cost of the toy before the increase. The initial price of the toy is $6.39.
The new cost of the toy is equal to the original cost of the toy plus the amount by which cost was increased.
New cost of the toy = original cost + amount of increase
$9.84 = c + $3.49
In order to determine the value of c, make c the subject of the formula by combining similar terms
c = $9.84 - $3.49
Add similar terms together
c = $6.35
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