What is the perfect learning environment

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal

What is the sum of these mixed numbers 4 2/3+ 3 1/9