$\frac{ x+3 }{ 2 }-\frac{ 2x+1 }{ 3 }=0$
Multiply both sides of the equation by $6$$3\left( x+3 \right)-2\left( 2x+1 \right)=0$
Distribute $3$ through the parentheses$3x+9-2\left( 2x+1 \right)=0$
Distribute $-2$ through the parentheses$3x+9-4x-2=0$
Collect like terms$-x+9-2=0$
Subtract the numbers$-x+7=0$
Change the signs on both sides of the equation$x-7=0$