اگر $f\left( x \right)=\left\{ \begin{matrix} 3x+2\,\,\,\,\,\,\,\,\,\,\,\,x\ge 0 \\ 1+x\,\,\,\,\,\,\,\,\,\,\,\,x\lt 0 \\\end{matrix} \right.$ و $g\left( x \right)=\left\{ \begin{matrix} 2x+7\,\,\,\,\,\,\,\,\,\,\,\,x\ge 0 \\ -x+3\,\,\,\,\,\,\,\,\,\,\,\,x\lt 0 \\\end{matrix} \right.$ باشد، معادله $f\left( x \right)=g\left( x \right)$ چند جواب دارد؟