Question

x + 40 = 50 + 20 

Answer 1

x + 40 = 50 + 20

x + 40 = 70

x = 70 - 40

x = 30 

Answer 2

x+40=50+20

x+40=70

x=70-40

x=30

Answer 3

x + 40 = 50 + 20

x + 40 = 70

        x = 70 - 40

       x = 30

Answer 4

x+40=50+20

x+40=70

x    = 30

vậy x=30

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Answer 5

x+40=50+20

x+40=70

     x =70-40

     x =30.

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Answer 6

=30

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Answer 7

x + 40 = 50 + 20

x + 40 = 70

x        = 70 - 40 

x        = 30

Answer 8

x + 40 = 50 + 20

x + 40 = 70

x        = 70 - 40

x        = 30