SOLUTION: the sum of two numbers is 12.if one number is subtracted from twice the other, their difference i 9. find the numbers.

Question 888639: the sum of two numbers is 12.if one number is subtracted from twice the other, their difference i 9. find the numbers.
Found 2 solutions by Okamiden, MathTherapy:
Answer by Okamiden(22) (Show Source): You can put this solution on YOUR website!
Let's name the numbers x and y.
.
x + y = 12, the sum of the two numbers
.
x-2y = 9, where one number is substracted twice from the other.
.
Now, we just use one of the rules for solving two equations with two variables.
I suggest this method:
x + y = 12 -> x = 12-y
.
x - 2y = 9 -> 12 - y - 2y = 9
.
12 - 3y = 9
.
-3y = -3
.
y = 1
.
x = 12-y = 11
.
Answer, 11 and 1! You can verify yourself. :)

Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!

the sum of two numbers is 12.if one number is subtracted from twice the other, their difference i 9. find the numbers.

Numbers:
You can do the check!!
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