0}} \right.\\\\ \left \{ {{3-x=1} \atop {x<3}} \right.\\\\ \left \{ {{x=2} \atop {x<3}} \right. \\\\x=2 " alt="log_{2}(3-x)=0\\\\ \left \{ {{3-x=2^0} \atop {3-x>0}} \right.\\\\ \left \{ {{3-x=1} \atop {x<3}} \right.\\\\ \left \{ {{x=2} \atop {x<3}} \right. \\\\x=2 " align="absmiddle" class="latex-formula">