Please help i’m struggling

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).

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Find the commission on a $590.00 sale if the commission is 15%.