$$0.65x-x\times 0.06-600=1885$$
Combine $0.65x$ and $-x\times 0.06$ to get $0.59x$.$$0.59x-600=1885$$
Add $600$ to both sides.$$0.59x=1885+600$$
Add $1885$ and $600$ to get $2485$.$$0.59x=2485$$
Divide both sides by $0.59$.$$x=\frac{2485}{0.59}$$
Expand $\frac{2485}{0.59}$ by multiplying both numerator and the denominator by $100$.$$x=\frac{248500}{59}$$