u/Human-Society-2085

So right now I'm trying to learn the most well known part of Solace, here's the pdf. https://ks15.imslp.org/files/imglnks/usimg/6/63/IMSLP256599-PMLP13284-solace.pdf

How am I supposed to sustain the bass notes as indicated without blurring together the melody notes/inner voices? Especially in m. 4 or 7, pedaling would interfere with the harmony (between the A and G#). Unfortunately I'm on a Casio keyboard so there's just a single sustain pedal. Thanks.