Question

The steps in the simplification of the expression 6 + 3x + 4y − 2x – y − 7 are shown below.

Answer 1

Step 1: 6 – 7 + 3x − 2x + 4y − y
Step 2: (6 − 7) + (3x − 2x) + (4y − y)
Step 3: −1 + x (3 − 2) + y (4 − 1)
Step 4: −1 + x (1) + y (3)
Step 5: −1 + x + 3y

Which statement is correct?

Step 2 uses associative property of addition, and step 3 uses distributive property of addition.

Step 1 uses commutative property of addition, and step 5 uses associative property of addition.

Step 4 uses associative property of addition, and step 3 uses commutative property of addition.

Step 2 uses distributive property of addition, and step 4 uses commutative property of addition.

Answer 2

Step 2 uses distributive property of addition, and step 4 uses commutative property of addition.
@Outkast3r09 am i correct