17(х+13)-19(х-21)+249=25(5х-53)-3(7х576)

17(х+13)-19(х-21)+249=25(5х-53)-3(7х-576);17х+17*13-19х+19*21+249=25*5х-25*53-3*7х + 3*576;17х + 221 - 19х + 399 + 249 = 125х - 1325 - 21х + 1728;17х - 19х -125х + 21х = - 1325 + 1728 - 221 - 399 - 249;-106х = - 466;х = 466/106 ;х = 4 42/106;х = 4 21/53.