Question

Sarah wrote the following steps to simplify the expression (8x – 6y – 5x).
Step 1: 8x – 5x – 6y; using commutative property of addition
Step 2: (8x – 5x) – 6y; using associative property of addition
Step 3: x(8 – 5 – 6); using distributive property of addition
Step 4: x(-3); simplifying
Which step was incorrect, and what should be the correct step that Sarah should use?
A.) Step 2 was incorrect. Correct step: 8x – (5y − 6y); using associative property of addition
B.) Step 3 was incorrect. Correct step: 8x – (5 + 6) y; using distributive property of addition

Answer 1

C.) Step 3 was incorrect. Correct step: x(8 – 5) – 6y; using distributive property of addition
D.) Step 2 was incorrect. Correct step: 8x – (5x + 6y); using associative property of addition

Answer 2

@zepp

Answer 3

Step 2: (8x – 5x) – 6y; using associative property of addition
Step 3: x(8 – 5 – 6); using distributive property of addition

Here, do you see something that's missing?

Answer 4

the y in step 3?

Answer 5

That's right, so you can eliminate 2 and 3, now tell me, what step should after (8x – 5x) – 6y?

Answer 6

is it C?

Answer 7

Yes, good job :)

Answer 8

thank you for your help i had this here for almost an hour.

Answer 9

You are welcome :))