Question

Sanjay solved the equation below. Which property did he use to determine that 7 x + 42 = 42 is equivalent to 7 x = 0?

7 (x + 6) = 42. 7 x + 42 + 42. 7 x = 0. x = 0.
distributive property of equality
subtraction property of equality
multiplication property of equality
division property of equality

Answer 1

Subtraction property of equality — he subtracted 42 from both sides of 7x + 42 = 42 to get 7x = 0.