X+7=28
x=28-7
x=21 is the answer
Im confused why did you say the answer when you asked the question
Hello! The solution to this equation does work, because 5 * 3 is 15. When you subtract a negative, you’re actually adding. 15 + 6 is 21. 3 is x and -6 is y. When the values are plugged into the equation, they work.