need help defining a formula value within a variable

john_lopez363

I have this variable defined.  As you can see I am using two other variable definitions to define the value of a third variable.  As written it works just fine.  Im taking the #slat_width multiplying by a factor of .87 and then dividing by the #slat_slot_count to define the #slat_slot_distance.

What I NEED to do instead is subtract a value (70) from #slat_width variable then divide it by the #slat_slot_count variable. 

However when I replace the multiple (*) with the subtract (-) operator it fails.  What am I doing wrong/how do I fix this?

MichaelPascoe

For multiplication and division, you can multiply a (value with units) by a (unitless value): 45in * 4
However, for addition and subtraction, both values need to have similar units: 45in - 5m 

So you could not do:
45in - 5
45in - 5in^2

MichaelPascoe

For multiplication and division, you can multiply a (value with units) by a (unitless value): 45in * 4
However, for addition and subtraction, both values need to have similar units: 45in - 5m 

So you could not do:
45in - 5
45in - 5in^2

NeilCooke

You are subtracting a number from a length (70mm? 70in? 70km?) - you need to define the units of the number.

john_lopez363

Doh...such a simple thing!  Thanks @NeilCooke