Question 281386
x = one number
y = another number
x + y = 45  :: given
x = y + 9  :: y is 9 less than x
.
substitute x = y+9 in the first equation
.
y+9 + y = 45
2y = 36
y = 18
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now substitute y=18 in the second equation
x + y = 45
x + 18 = 45
x = 27
.
checking...
Is the smaller number 9 less than the larger number?
Yes.
.
Answer:
The two numbers are 18 and 27.
.
Done