Answer:
$2.25
Step-by-step explanation:
>givens:
2 pretzels + 1 lemonade = $5.75
2 lemonades = 1 pretzel + $0.25
>find from the first equation how much is 1 lemonade
2 pretzels + 1 lemonade = $5.75, subtract 2 pretzels from both sides
1 lemonade = 5.75 -2 pretzels
>substitute in the second equation 2 lemonades with 2(5.75-2 pretzels)
2 lemonades = 1 pretzel + $0.25
2(5.75-2 pretzels) = 1 pretzel + $0.25, distribute 2 in parentheses
11.5 -4 pretzels = 1 pretzel +0.25, isolate like terms
11.5-0.25 = 1+4 pretzels, combine like terms
11.25 = 5 pretzels, divide both sides by 5
1 pretzel = $2.25
*you can use the letter "p" for pretzel and "l" for lemonade to make the equations more concise