Question

Sherry uses the steps below to solve the equation x+(-8)=3x+6 .

Step 1 Add 1 negative x-tile to both sides and create zero pairs
Step 2 Add 8 positive unit tiles to both sides and create zero pairs.
Step 3 Divide the 14 unit tiles evenly among the 2 x-tiles.
Step 4 The solution is x=7

What is Sherry’s error?
In step 1, she should have added 3 negative x-tiles to both sides.
In step 2, she should have added 6 negative unit tiles to both sides.
In step 3, she did not divide the tiles evenly.
In step 4, she should have found the solution mc022-3.jpg.

Answer 1

Remember that when solving for x you need to have the x's on one side of the equal side and the constants on the other side