Variable $x$ cannot be equal to $0$ since division by zero is not defined. Multiply both sides of the equation by $10x$, the least common multiple of $x,2x,5$.
$$10\times 2-5\times 3=2x$$
Do the multiplications.
$$20-15=2x$$
Subtract $15$ from $20$ to get $5$.
$$5=2x$$
Swap sides so that all variable terms are on the left hand side.
