Question 1057276
{{{28=46-sqrt(0.042x+16)}}}
{{{-18=-sqrt(0.042x+16)}}}
Square both sides,
{{{-18=-sqrt(0.042x+16)}}}
{{{324=0.042x+16}}}
{{{308=0.042x}}}
{{{x=308/0.042}}}
{{{x=7333&1/3}}}