Question

A cup of brewed tea has 54 milligrams less caffeine than a cup of brewed coffee. If a cup of tea has 66 milligrams of caffeine, how much caffeine is in a cup of coffee? Write this problem in an equation.

Answer 1

x-54= 66 x being the amount of caffeine in the cup of coffee.

Answer 2

There is 120 milligrams of caffeine in a cup of coffee.

Explanation:

A cup of brewed tea has 54 milligrams less caffeine than a cup of brewed coffee. A cup of tea has 66 milligrams of caffeine.

Let the amount of caffeine in a cup of coffee be = x

In the equation form, we can denote this as:

`66=x-54`

Solving for x

`x=66+54`

x = 120

Therefore, there is 120 milligrams of caffeine in a cup of coffee.