Question

x + 10 = 30 + 20 

Answer 1

x + 10 = 20 + 30

x + 10=50

x = 50-10

x = 40

Answer 2

x + 10 = 30 + 20

x + 10 = 50

x        = 50 - 10

x       = 40

Answer 3

x+10=30+20

x+10=50

x     =50-10

x     =40

Answer 4

x + 10 = 30 + 20

x + 10 = 50

x         = 50 - 10

x         = 40

dung ko ban?