Indicate which property is illustrated in step 8.
step 1: 2(x + 4) -4x = 1 + x
step 2:2x= 8 - 4x = 1 + x
step 3: 8 - 2x = 1 + x
step 4: 8- 2x - x = 1 + x - x
step 5: 8 -3x -8 + 1 - 8
step 6: 8 - 3x - 8 + 1 - 8
step 7: -3x = -7
step 8 :
step 9: