Помогите решить! х•40+3800=6400 (х-2740):20=360

х•40+3800=6400 40х=6400-3800 40х=2600 х=2600:40=65 (х-2740):20=360 х-2740=360*20 х=7200+2740=9940

х*40+3800=6400 х*40=6400-3800 х*40=2600 х=2600/40 х=65 65*40+3800=6400 6400=6400 (х-2740):20=360 х-2740/20=360 х-2740=360*20 х-2740=7200 х=7200+2740 х=9940 (9940-2740)/20=360 360=360