Answer:
I know this is late but here
Slope = -1/25, y-intercept = 15
I can’t really explain it though
You divide 18 with 3 and is going to equal 6 so that should be your constant proportionality
I’m struggling too I’m sorry
Just draw one empty circle for 1 and then a filled circle for -1 so then it's 1-1 which equals 0
N+2n+20-4=12+3n
3n+20-4-12=12-12+3n
3n+4=3n
3n/3 + 4= 3n/3
n+4=n
n+4-4=n-4
n=n-4
theres no further simplification, unless i messed up ...