it took lisa 85 minutes to wash 3 cars. she spent x minutes on each car and 10 minutes putting everything away. write the equation that represents this situation and find the number of minutes she spent washing each car.

You can represent the unknown amounts by the use of variables. Follow whatever the description is and convert it one by one mathematically. For example if it is asked to increase some item by 4 , then you can add 4 in that item to increase it by 4. If something is for example, doubled, then you can multiply that thing by 2 and so on methods can be used to convert description to mathematical expressions.

For this case, we're specified that:

Lisa washed 3 cars in 85 minutes.
Lisa spent x minutes on each car + 10 minutes putting everything away.

So, we have:

Time spent on 3 cars washing = x + x + x(3 times) + 10

85 = 3x + 10

Subtracting 10 from both the sides

75 = 3x

Dividing both the sides by 3:

75/3 = 3x/3

25 = x

x = 25 (minutes).

Thus, the equation that represents this situation and find the number of minutes she spent washing each car is 25 minutes

Learn more about forming equations here:

https://brainly.com/question/11938672