Supplementary means that the angles have to add up to 180, so you have your equation.
180=5x+17x-18
198=22x
x=9
Then to find the measures of the angles, you plug x back in.
m∠ABD=5(9)=45 degrees
m∠BDE=17(9)-18=153-18=135 degrees
I kept getting 900 i am sorry if that is incorrect
Answer
I think it's going to be (-5,0)
Step-by-step explanation:
