SOLUTION: I am in 7th grade pre-algebra. I am trying to find an equation of 2 numbers that sum is 15 and product is 54. I know the 2 numbers are 6 and 9, but can't figure out the equation!

Question 255423: I am in 7th grade pre-algebra. I am trying to find an equation of 2 numbers that sum is 15 and product is 54. I know the 2 numbers are 6 and 9, but can't figure out the equation!
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
find an equation of 2 numbers that sum is 15 and product is 54.
------------
x + y = 15
x*y = 54
---------
y = 15-x
Sub for y in 2nd eqn
x*(15-x) = 54

(x-6)*(x-9) = 0
x = 6
x = 9

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