An airplane departs an airport and climbs to an altitude of 3,300 feet. The airplane descends 400 feet before climbing 1,200 feet more. What is the airplane's altitude now? A) 3,500 feet B) 3,700 feet C) 3,900 feet D) 4,100 feet

Analyze the solution below. 7 3 x = −2 7 3 x(3 7 ) = −2(3 7 ) x = − 6 7 what property was used to solve the equation? property of opposites division property of equality addition property of equality multiplication property of equality