Step-by-step explanation:
[tex]56 = 2n + 99[/tex]
Collect like terms and simplify
[tex]56 - 99 = 2n \\ - 43 = 2n[/tex]
Divide both sides of the equation by 2
[tex] \frac{ - 43}{2} = \frac{2n}{2} [/tex]
Simplify
[tex]n = - \frac{43}{2} = - 21 \frac{1}{2} [/tex]
