Respuesta :

write an equation that represents the situation letting x be the cost of the pencils

[tex]25-2x=21[/tex]

solve for x

[tex]\begin{gathered} -2x=21-25 \\ -2x=-4 \\ x=\frac{-4}{-2} \\ x=2 \end{gathered}[/tex]

each pencil costs $2.

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