как решить (d-389)*3=807 8*(5400-s)=5536 t:(6400-6393)=8500 (119+h):8=75

(d-389)*3=807;d-389=807/3d-389=269d=269+389d=658.8*(5400-s)=55365400-s=5536/85400-s=692s=5400-692s=4708t:(6400-6393)=8500t/7=8500t=8500*7t=59500(119+h):8=75119+h=75*8119+h=600h=600-119h=481