-2.6b + 4 = 0.9b - 17
+2.6b +2.6b
4 = 3.5b -17
+17 +17
21 = 3.5b
[tex]\frac{21}{3.5} = \frac{3.5b}{3.5}[/tex]
6 = b
Answer: b = 6
