Spot the broken step

Exercise and reference answers

Questions

1. Statement parts

   1. 3x + 4 = -8
   2. 3x = -8 + 4
   3. 3x = -12
   4. x = -4

   Correction

   3x = -8 - 4

   Incorrect part

   3x = -8 + 4

2. Statement parts

   1. 5y - 9 = 16
   2. 5y = 16 + 9
   3. 5y = 25
   4. y = 3

   Correction

   y = 5

   Incorrect part

   y = 3

3. Statement parts

   1. 12x = -x + 26
   2. 12x - x = 26
   3. 13x = 26
   4. x = 2

   Correction

   12x + x = 26

   Incorrect part

   12x - x = 26

Instructions

One line in each worked solution is wrong. Tap it, then check the correction.

Explanation