3y - 6y + 18 = 8 + 3y - 20

y = 5

Step-by-step explanation:

3y - 6y + 18 = 8 + 3y - 20

in order to simplify this expression we need to consider the positive and negative signs carefully and diligently collect the like terms.

3y - 6y + 18 = 8 + 3y - 20

3y - 6y + 18 + 20 = 8 + 3y

3y - 6y + 38 - 8 = 3y

38-8 = 3y - 3y + 6y

30 = 6y

divide both sides by 6

30/6 = 6y/6

5 = y

therefore y = 5