I only have 10w-30 synthetic oil for my 94 Honda accord lx?

I only have 10w-30 synthetic oil for my 94 Honda accord lx? - 1

Take it somewhere that sells the same brand/type of oil and ask if you can trade it for the type you need. They can't prove you didn't buy it there without alot of extra effort

Put it in and use it.

Even those ancient Hondas used 5W-30. 10W-30 is NOT recommended - unless you literally have no other option and will change the oil to the correct viscosity shortly. (Even the wrong oil is better than no oil.)