9=-5b-23
9+23=-5b
32=-5b
32/-5=b. ..(here 32/-5= 32 upon -5)
-6.4=b
Answer:
[tex]9 = - 5b - 23 \\ - 5b = 9 + 23 \\ = 32 \\ b = \frac{32}{5} \\ = 6.4[/tex]
