Answer:
-4
Step-by-step explanation:
-3r+9=-4r+5
-3r+4r=5-9
r=-4
I got r=-1
first I had 3 R over the = and into -4r
second I subtracted the 5 over the = and onto the 9
now you have: 4=-1r
divide the -1 over to have a positive R
and a -4
