Question

The students in Mr. Kim's class are discussing how to apply the properties of equality. Juan started with the equation 4 +5 = 9. He multiplied the left side by 3. He said that he could divide the right side by another

Answer 1

B. 3

1) Let's examine Juan's work

4+5 = 9 Multiplying the left side

(4+5)*3 =9

27 = 9 Divide only the right side by 3

9 = 3 False!

2) Then we can state that

B.

The only way Juan can maintain equality is by multiplying the right side by

3

27= 9

27 = 9 x 3

27 = 27 True!

3) The answer is B and 3.