Question

5 p + 1 = -9 ( p = 3 )​

Answer 1

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5p + 1 = -9. (p = 3)

➪ 5 × 3 + 1 = 9

➪ 15 + 1 = -9

➪ 16 ≠ -9

_______________________

5p + 1 = -9

➪ 5p = -9 - 1

➪ 5p = -10

➪ p = -10/5

➪ p = -2

Answer 2

$5p + 1 = -9 \\\\\ \implies 5(3) + 1 = -9 \\\\\ \implies 15 + 1 = -9 \\\\\ \implies 16 ≠ -9$

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$5p + 1 = -9 \\\\\ \implies 5p = -9 - 1 = -10 \\\\\ \implies p = \frac{-10}{5} = -2$