Question 501496
x = 2y
x + y = 90
x = 90-y
.
substitute
.
90-y = 2y
90 = 3y
y = 30
.
x = 2y
x = 60
.
Always check your answer.
Is 60 two times 30?
Yes, it is.
.
Answer:  The two numbers are 30 and 60.