980-х =45+347+10363:х=18*5

Question

980-х =45+347+103
63:х=18*5

Answer 1

980-х=45+347+103
-х= -980+45+347+103
-×= -485 (×-1)
х=485
980-485=45+347+103
495=495

63:х=18×5
63:х=90
х=63:90 х=0,7
63:0,7 =90
90=90