Question

The steps in the simplification of the expression 32 + 4x + 3y − 2x – y − 27 are shown below.

Step 1: 32 – 27 + 4x − 2x + 3y − y
Step 2: (32 − 27) + (4x − 2x) + (3y − y)
Step 3: 5 + x (4 − 2) + y (3 − 1)
Step 4: 5 + x (2) + y (2)
Step 5: 5 + 2x + 2y

Which statement is correct?

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

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

Step 1 uses commutative property of addition, and step 3 uses distributive property of addi