3y - 2 = y + 4

what is the value of y? i got 3 from a calculator but i'm having trouble understanding why. could anyone briefly explain how you get this answer?

my attempt is:
3y - 2 = y + 4
+2 +2
3y = y + 6
here is where i get stuck. if you divide, the y value goes away. but you cannot subtract because there is nothing to subtract could someone explain my next step and/or where i am going wrong?

Paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each? 1. define a variable for the situation. 2. write an inequality that represents her profit. note: revenue is money coming in. cost is money going out. profit is the difference between the revenue and the cost. in other words: revenue - costs profit 3.using words, describe how many windows she must sell to have a profit of at least $48,000.