PLEASE HURRY What value of x is in the solution set of 3(x-4) 25x + 2? options are -10,-5,5,or 10

For the equations below which statement is true ?

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).

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?