Question

Please need a fast reply​

Answer 1

`\sf \bf {\boxed {\mathbb {C. \: 21n + 7}}}`

`\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\red{:}}}}}`

`7 \: ( \: 3n + 1 \: )`

➼
`\: 21n + 7`

`\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{❦}}}}}`