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d Solve. See Example 6 19. Find the original price of a pair of shoes if the sale price is $78 after a 25% discount 20. Find the original price of a popular pair of shoes if the increased price is $80 after a 25% increase. Find last years salary if, after a 4% pay raise, this years salary is $44,200. 021. Find last years salary if, after a 3% pay raise, this years salary is $55,620. 22. Solve. For each exercise, a table is given for you to complete and use to write an equation that models the situation. See Example. 23. How much pure acid should be mixed with 2 gallons of a 40% acid solution in order to get a 70% acid solution? Number of Acid Amount of Acid Gallons Strength 100% Pure Acid 40% Acid Solution 70% Acid Solution Needed

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a low 44 200 lo4%(x)-44200 to 4 χ二42500 laat salads. $4250。

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