Question 1129728

you are right, the coefficient IS {{{3}}}

by definition:
the coefficient is a {{{number}}} or {{{symbol}}}{{{ multiplied }}}with a {{{variable}}} or an {{{unknown }}}quantity in an algebraic term

For example:  
{{{4}}} is the {{{coefficient}}} in the term {{{4x}}}, 

and {{{x}}} is the {{{coefficient}}} in {{{x(a + b)}}}