4y = 42 - 3y
First, add '3y' to both of the sides.
[tex]4y + 3y = 42[/tex]
Second, add '4y + 3y' to get '7y'.
[tex]7y = 42[/tex]
Third, divide both sides by '7'.
[tex]y = \frac{42}{7} [/tex]
Fourth, how many times does 7 go into 42? 42 ÷ 7 = '6'.
[tex]y = 6[/tex]
Answer: y = 6
