William says that 15 years from now, his age will be 3 times his age 5 years ago. If x represents William’s present age, complete the following sentences. 15 years18 yearsx − 15 = 3(x + 5)x + 15 = 3(x − 5)

William's present age = x
William 15 years from now = x + 15
William 5 years ago = x - 5

William says that 15 years from now, his age will be 3 times his age 5 years ago. 
x + 15 = 3(x-5)  ← equation formed
x + 15 = 3x - 15
3x - x = 15 + 15
2x = 30
x = 15 . ← William's current age
William is 15 now