Brandon uses the steps below to solve the equation 15x+6 - 14x+5 using algebra tiles.
Step 1
Step 2
Step 3
Add 14 negative x-tiles to both sides.
Add 5 negative unit tiles to both sides
The solution is x-1.
Which explains whether Brandon is correct?
Brandon is correct because he has the correct solution in step 3.
Brandon is correct because he forms zero pairs to isolate the variable by using the lowest coefficient each time.
• Brandon is not correct because he should have performed step 2 before performing step 1.
Brandon is not correct because he should have added 6 negative unit tiles to isolate the variable in step 2