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Can anyone please tell me why mathcad 15 chooses to not recognise variable definition when you are using the equation directly under it's definition ie x=x
2*x
You probably need to provide some more information to get a better answer. However, here are two possible options.
Assign a value to x:
x:=5
2*x=10
Write a function:
f(x):=2*x
f(5)=10
f(7)=14
x=x is not a definition.
x := 2 defines the variable x as being equal to the number 2 (shift 🙂
x = x defines a Boolean constraint (cntrl 😃
Just note that after the variable definition, you can change the display of the sign equal (right-click on the definition and select "View Definition As" --> "Colon Equal"/"Equal").