Answer:
n = 30
Step-by-step explanation:
Isolate the term in n by subtracting 7 from both sides, that is
[tex]\frac{n}{10}[/tex] = 3 ( multiply both sides by 10 )
n=30
[tex]\frac{n}{10}+7=10\\\\\frac{n}{10} =3\\n=30[/tex]
