Find the scale factor

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).

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

Wrote and expression for the difference of p and 4