contestada

if x is the first, or smallest, of three consecutive integers, express the sum of the integer and the third integer as an algebraic expression containing the variable x.

Respuesta :

Consecutive numbers differ by one. So, if [tex]x[/tex] is the first, the three numbers are

[tex]x,\ x+1,\ x+2[/tex]

The sum of the first and third integer is

[tex]x+(x+2)=2x+2[/tex]

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