Question

x + 650 + 10 = 650 + 90

Answer 1

x+650+10=650+90

x+660      =740

              x=740-660

              x=80

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Answer 2

x+650+10=650+90

x+650+10=740

x+650=740-10

x+650=730

x=730-650

x=80

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Answer 3

x + 650 + 10 = 650 + 90

x + 650 + 10 = 740

x + 650        = 740 - 10

x + 650        = 730

x                 = 730 - 650

x                 = 80

Answer 4

x+650+10=740

x+650=740-10

x+650=730

     x= 730-650

     x= 80

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Answer 5

x + 650 + 10 = 650 + 90

x + 650 + 10 = 740

x + 650        = 740 - 10

x + 650        = 730

                x = 730 - 650

                x =  80

Answer 6

x + 650 + 10 = 650 + 90
Cách 1:
x + 650 + 10 = 650 + 90
x + 650 + 10 = 740
x + 660 = 740
x = 740 - 660
x = 80
Cách 2:
x + 650 + 10 = 650 + 90
x + 650 + 10 = 740
x + 650 = 740 - 10
x + 650 = 730
x = 730 - 650
x = 80

Answer 7

\(x+650+10=650+90\)

\(x+10=90\)

\(x=90-10\)

\(x=80\)

Answer 8

x + 650 + 10 = 650 + 90

x +    660     =     740

x                 =  740 -  660

x                 =     80

Answer 9

x+650+10=740

x+660=740

x=740-660

x=120

Answer 10

x+650+10=740

x+660=740

x=740-660

x=80

Answer 11

x+650+10=740

x+660=740

x=740-660

x=80