Pls i need this asap.
P. S. its not 371,450

Ineed with number 17 i don’t get it at alll

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).

Find the solution of this system of equation -7x+y=-20 9x-3y=36