What is the value of x in the equation x – y = 30, when y = 15?

X should be 45
45-15=30

So you can plug in 15 and now the equation is x - 15 = 30. so then add 15 to 30 and so x is 45. you can plug in the numbers to see if it is correct. 45 - 15 does equal 30 so it is true. x = 45