1.Steve was checking. "You sold 74 spark plugs today," he said. "That's fine, but how so many?" "Just the usual servicing. 8-cylinder, 6-cylinder, and 4-cylinder cars," replied Andy. "A full set for every car, and there were twice as many fours as sixes." How many 8-cylinder cars?

Four 8-cylinder cars

Six 8-cylinder cars

Seven 8-cylinder cars