Answer
$= 2b(0.18c - 0.29a)$
Work Step by Step
Looking at the variables, we have terms with both $ab$ and $bc$. We group like terms using parenthesis to make simplification easier. Then, we simply add or subtract the corresponding coefficients. Finally, we factor out $2b$.
$0.24ab + 0.73bc - 0.82ab - 0.37bc$
$= (0.24ab - 0.82ab) + (0.73bc - 0.37bc)$ (Rewrite the order)
$= -0.58ab + 0.36bc$
$= 0.36bc - 0.58ab$ (Factor out $2b$)
$= 2b(0.18c - 0.29a)$
