Question

все три решите пж 5 класс

Answer 1

7) 475 - (x-671) = 325
475 - x + 671 = 325
-x = 325-475-671
-x = -821, x = 821

8) 972 - (y-504) = 284
972 - y + 504 = 284
-y = 284-972-504
-y = -1192, y = 1192

9)403 - (634-a) = 366
403 - 634 + a = 366
a = 366-403+634
a = 597

Answer 2

475-(х-671)=325
-х+671+475=325
-х+1146=315
-х=-821
х=821
975(у-504)=284
у-504=284/975
у=284+491400/975
у=491684/975
403-(634-а)=366
403+а-634=366
а-231=366
а=597