Solve for
b. b 0.6=−1 what is the answer?

I assume the expression is written this way,
                                b(0.6) = -1
or this can be better written as,
                                 0.6b = -1
To answer the question, we divide both sides of the equation by 0.6 and that will give us an answer of,
                               b = -1/0.6 = -5/3

Dis the correct  answer