Dominique is saving up money to buy herself a bunk bed that costs $422. Dominique already has 78 dollars saved up, but she wants to make a plan to save the rest of the money she needs. She wants to save the same amount of money, x, for 8 months. Write an equation that will help Dominique find out how much money she must save each month. Use the equation to find how much Dominique will need to save each month if she wants to buy the bunk bed in 8 months. Make sure to show your work.