The changes in the price of a certain stock each day from Monday to Thursday of one week were -$2.25, +$0.50, +$1.50, and +$0.75. If the overall change in the stock price for the week was -$0.50, write an equation that can be used to find the change in the price on Friday and explain two methods of solving this equation. Then solve the equation and explain its meaning in the context of the situation.
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