A. 6x^2+6y^2= 144

b. x^2/20 + y^2/20 = 1

c. x^2 + y^2 = 16

d. 20x^2 - 20y^2 = 400

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