Question 1024464
{{{8/10(3/2 - 8b) + 3b -5m}}} -------I assume the rendering does not show what is really given.


GUESS:  You are actually maybe given  {{{(8/10)(3/2-8b)+3b-5m}}}


The order of operations among Addition, Subtraction, Multiplication, Division, Groupings must go in this order:
Parentheses (grouping symbols);
Exponents
Multiplications
Divisions
Additions
Subtractions
-
Meaning, do operations inside grouping symbols FIRST,... and do subtractions LAST  (if any); and everything else listed, in order.


What groupings do you find?
Only {{{(3/2-8b)}}}; and no computations or simplifications are possible in this expression.


What is next?  Exponents?  No.  None.


Do then, any multiplications, in your case, involving Distributive Property.

{{{(8/10)(3/2)-(8/10)(8b)+3b-5m}}}
SIMPLIFY ANY TERMS!
{{{3*4/10-(4/5)8b+3b-5m}}}
{{{6/5-(32/5)b+3b-5m}}}


Not finished, but now is a good time to begin combining like-terms.
{{{-(32/5)b+3b-5m+6/5}}}, which uses Commutative Property of Equality.


Use ordinary fractions skills to finish combining the terms of b.
{{{-(32/5)b+(5/5)(3b)-5m+6/5}}}
{{{-((32+5)/5)b-5m+6/5}}}
{{{highlight(-(37/5)b-5m+6/5)}}}-----basically done, unless you want mixed number coefficients instead of improper fraction coefficients.