Answer:r=1
Explanation:
12-5(3r+2)=17
Use PEMDAS
First step is
-5 *3r=-15r
-5*2=-10
Next you drag everything down
12-15r-10=17
Then you subtract terms
2-15r=17
Rerage terms
Next
-15r+2-2=17-2
-15r=17-2
Subtract terms
-15r=15
Divide -15 on both sides
r=-1