(223440-130*х):35 = 6020

(223440-130*х)=6020*35
223440-130*х=210700
130*х=210700-223440
130*х=12740
х=12740:130
х=90

(223440-130*98):35=6020
130*98=12740
223440-12740=210700
210700:35=6020

(223440-130*x):35=6020
223440-130*x=6020*35
223440-130*x=210700
130*x=223440-210700
130*x=12740
x=12740:130
x=98