Answer:
D. 7n = 28
Step-by-step explanation:
Let's substitute 4 for n in each equation to check if it the resulting equation is correct:
[tex]6+n=24\\ 6+4=24\\ 10\neq 24\rightarrow \text{Incorrect!}[/tex]
[tex]5n=54\\5(4)=54\\20\neq54\rightarrow\text{Incorrect!}[/tex]
[tex]12-n=16\\12-4=16\\8\neq16\rightarrow\text{Incorrect!}[/tex]
[tex]7n=28\\7(4)=28\\28=28\rightarrow\text{Correct!}[/tex]
Therefore the answer is D
Step-by-step explanation:
