How would I get the equation from this word problem?

[Xel3]

"Find the measure of an angle such that the difference between the measures of it's supplement and three times it's complement is 10 degrees."

Thanks

 

[stapel]

1) Pick a variable for the measure of the angle.

2) Write an expression, in terms of this variable, for the measure of the supplement.

3) Write another expression, still in terms of this variable, for the measure of the complement.

4) Edit the expression in (3) to represent "three times the complement".

5) Subtract (4) from (2).

6) Set equal to "10".

7) Solve for the value of the variable.

Eliz.