Sherry uses the steps below to solve the equation x+ (-8) = 3x+6
step 1
step 2
step 3
step 4
add 1 negative x-tile to both sides and create zero pairs
add 8 positive unit tiles to both sides and create zero pairs.
divide the 14 unit tiles evenly among the 2 x-tiles
the solution is x= 7
what is sherry's error?