My family went to starbucks. We ordered 3 drinks. My daughter's drink was .90 cents less than my drink and my sons drink was $2.20 more than my drink. The total bill was $12.90. How much was each drink? Use algebra.
Please help me, thanx
sorry I had to repost this question. i really need help
Let x = parent's drink, then daughter's = x -.90 and son's = x + 2.20.
x + (x-.90) + (x+2.20) = 12.90
Solve for x.
No problem, I'm here to help! Let's solve this problem step by step using algebra.
Let's assume the cost of your drink is 'x' dollars.
According to the information given:
- Your daughter's drink is $0.90 cents less than yours, so its cost would be (x - 0.90).
- Your son's drink is $2.20 more than yours, so its cost would be (x + 2.20).
Since the total bill for all three drinks is $12.90, we can set up an equation:
x + (x - 0.90) + (x + 2.20) = 12.90
Now, let's simplify and solve the equation:
3x + 1.30 = 12.90 (combine like terms)
3x = 11.60 (subtract 1.30 from both sides)
x = 3.87 (divide both sides by 3)
So, the cost of your drink is $3.87.
To find the cost of each of your family member's drinks, substitute the value of x back into the expressions we derived earlier:
Your daughter's drink: x - 0.90 = 3.87 - 0.90 = $2.97
Your son's drink: x + 2.20 = 3.87 + 2.20 = $6.07
Therefore, your daughter's drink costs $2.97, your son's drink costs $6.07, and your drink costs $3.87.