There 98 balls each cost $2 whats the total cost in 3 shipments

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).

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Which number completes the inequality? 2/3 < _ < 7/9