Question

x+6+7=90

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Answer 1

x+6+7=90

x  + 13 = 90

       x = 90 -13

       x = 77

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Answer 2

x + 6 + 7 = 90

x = 90 - 7 - 6

x = 77

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Answer 3

\(x+6+7=90\)

\(x+6\)       \(=90-7\)

\(x+6\)      \(=83\)

                \(x=83-6\)

               \(x=77\)

Answer 4

x=90-6-7

x=74

Answer 5

x+6+7=90

x+6    =90-7

x+6    =83

x        =83-6

x        =77

Vậy x   =    77

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Answer 6

ôi

x=90-6-7

x=77

Answer 7

x + 6 + 7= 90

x+6=90-7

x+6=83

    x= 83-6

    x= 77

Answer 8

x + 6 + 7 = 90

x + 13 = 90

x = 90 - 13

x = 77