Question

Ecuaciones aditivas
53-×=21
-y-39=29
-b+75=15
89=×-10
30-y=12
-24=2-12
Ayuda por favor no entiendo

Answer 1

53-×=21

-x= 21-53

-x= -32

 x= 32

-y-39=29

-y= 29+39

-y= 68

 y=-68

-b+75=15

-b= 15-75

-b= -60

b= 60

89=×-10

89+10=x

99=x

30-y=12

-y= 12-30

-y= -18

 y= 18