500 - (х + 37) = 417
500 - х - 37 = 417
- х = 417 - 500 +3 7
- х = - 46
х = 46
500 - (46+37) = 417
417 = 417
500 - (х + 37) = 417
500 - х - 37 = 417
- х = 417 - 500 +3 7
- х = - 46
х = 46
500 - (46+37) = 417
417 = 417