Question

x + 10 = 30 + 20

Answer 1

x + 10 = 30 + 20

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

Vậy x = 40

Answer 4

x+10=30+20

x+10=50

x=50-10

x=40

Answer 5

x+10=30+20

x+10=50

x      =50-10

x       =40

Answer 6

x+10=30+20

x+10=50

x=50-10

x=40

=>x can tim la:40

Answer 7

x+10=50

x=50-10

x=40

Answer 8

x+ 10 = 30+ 20 

=> x+ 10 = 50 

=> x= 40 

đáp số x= 40