dont. use. calculator

If x=-20.

PROOF

${x\over2}+(3*2)+{\sqrt16}=0$

${x\over2}+6+4=0$

${x\over2}+10=0$

${x\over2}=-10$

$x=-20$

CHECK

${-20\over2}+6+4=0$

$-10+10=0$

$0=0$

Thx m(sqr(64))