Respuesta :

Given data:

The given equation is -8x+x+15=-7x+12.

The given equation can be written as,

[tex]\begin{gathered} -8x+x+15=-7x+12 \\ -7x+15=-7x+12 \\ 15=12 \end{gathered}[/tex]

The above expression is false.

Thus, there is no value of x, so the answer is ϕ.

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