Chapter 2 - Equations, Inequalities, and Problem Solving - Review Exercises: Chapter 2 - Page 149: 20

$y=4$

Using the properties of equality, the solution to the given equation, $ 0.22y-0.6=0.12y+3-0.8y $, is \begin{array}{l}\require{cancel} 0.22y-0.12y+0.8y=3+0.6 \\\\ 0.9y=3.6 \\\\ y=\dfrac{3.6}{0.9} \\\\ y=4 .\end{array}