Question

Each​ month, a shopkeeper spends 7x+19 dollars on rent and electricity. If she spends 2x−7 dollars on​ rent, how much does she spend on​ electricity? Use pencil and paper. For which​ value(s) of x is the amount the shopkeeper spends on electricity less than​ $100? Explain how you found the​ value(s).

Answer 1

Explanation:

7x + 19 = cost rent and electricity

2x - 7 = cost of rent only

cost of electricity only = (7x + 19) - (2x - 7) = 5x + 26

5x + 26 < 100

5x < 74

x < 74/5

x < $14.80