Question

Twice a number plus 5 equals 81

Answer 1

`38 = x`

Explanation:

81 = 5 + 2x

- 5 - 5

___________

76 = 2x

__ __

2 2

`38 = x`

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Answer 2

2x+5=81

2x=81-5

2x=76

x=38