The problem turns out to be the following: 2x+15=3x-15. First you need to have only one x variable so you subtract the X's: 3x-2x=X The problem now turns into 15=x-15. You have to isolate the X so you do x+15. You have to do the same to the other side so 15+15=30, therefore x=30
Step-by-step explanation: look for a number line that has 180, 120, and 15 you see you have to multiply 15 by 12 dozen cupcakes which equals to 180 that way she earns more than $120
