Answer:
249.6
Step-by-step explanation:
Download photomath, it should help you sith all that :)
I can help you set up the equation, if you don't actually practice isolating you're never gonna learn,
it says the /sum of a number and seven/ which means n+7
is equal to /five less than the number/ so n-5
so your two parts are
n+7 = n-5
if you need further help contact me
hope can help u !!!!!!!!!!
