Eleni works out 15 fewer minutes on tuesday than on monday. she worked out 70 minutes on tuesday. use the five-step problem-solving plan. how many minutes did she work out on monday? enter you answer in the box.

We know the value of Tuesday, let's make this variable "T", is 70.
We also know the value of Monday, let's make this variable "M", is 15 minutes longer than the value of Tuesday.

Using these variables and the information provided we can make the expression: M=T+15
M=70+15
M=85
This means Eleni worked for 85 minutes on Monday.
Hope this helps :)