A car rental rents out SUVs for $300 a week and sedans for $220 a week. If the owner of the rental wants $75,000 in revenue, how many SUVs must be rented if 150 sedans are rented?
75,000 = 300x + 220y, where x is the number of SUVs rented and y is the number of sedans rented
75,000 = 300x + 220 (150)
75,000 = 300x + 33,000
42,000 = 300x
x = 140