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.
k so i did this: x+ (x-.90) + (x+2.20) = 12.90
how do you solve for x though... i tried doing this but i just don't understand pleese help
Let x = the parent's drink.
x+ (x-.90) + (x+2.20) = 12.90
Combine like terms:
3x + 1.30 = 12.90
3x = 12.90 - 1.30
3x = 11.60
x = 3.87
3.87 + 2.97 + 6.07
omg thank you, i was trying this too thanx:)
You're very welcome.
To solve for x in the equation you wrote, we can simplify it first:
x + (x - 0.90) + (x + 2.20) = 12.90
Combining like terms, we have:
3x + 1.30 = 12.90
Next, we can isolate the variable term by subtracting 1.30 from both sides of the equation:
3x = 12.90 - 1.30
3x = 11.60
Now, to solve for x, we divide both sides of the equation by 3:
x = 11.60 / 3
x ≈ 3.87
Therefore, each drink costs approximately $3.87.