If a regular triangle has a perimeter of 15x+84 , what is an expression for the length of one of its sides?
https://socratic.org/questions/how-do-you-factor-5-15x \displaystyle- {5} {\left ( {1}+ {3} {x}\right)} Explanation: By taking out the common factor which in this case is \displaystyle- {5} \displaystyle- {5}-.
