Question

X-120=1000-450 решить

Answer 1

х - 120 = 1000 - 450
х - 120 = 550
х= 550+120
х=670
___________
ответ: х = 670

Answer 2

1000-450=550

Answer 3

670-120=1000-450
1000-450=550
670-120=550
550=550