(x+3)*5=725,, 4949/7+20678,,,,,2*х+908=4052,,,,, 5*b-1209=1256...
(x+3)*5=725 4949/7+20678=21385 5b-1209=1256 5x+15-710=0 2x+908=4052 5b-2285=0 x=710/5 2x-3144=0 b=457 x=142 x=1572