# MATH!!!!!!

posted by .

the sum of two numbers is 99, the difference of those two numbers is 9. what are the two numbers???

• MATH!!!!!! -

I believe 54 and 45 would work.

• MATH!!!!!! -

yep it does ty...it was an easy problem i just didn't feel like solving it so thnx =]

• MATH!!!!!! -

But no work was shown. Was this just trial and error, or was math used?

"the sum of two numbers is 99"
x + y = 99

"the difference of those two numbers is 9."
x - y = 9

Solve one equation for either variable.
x - y = 9
x = y + 9

now substitute this value for x into the other equation.
x + y = 99
(y + 9) + y = 99
2y + 9 = 99
2y = 90
y = 45

Now substitute that numeric value for y into one of the original equations to find the numeric value of x.
x + y = 99
x + 45 = 99
x = 54

## Similar Questions

1. ### Int Algebra

The difference of two numbers is 7. The sum of the numbers is -1. What are the numbers?
2. ### Math

When factoring a trinomial that is in the format Ax^2 + Bx + C, the number that is represented by B should be viewed as the _____?
3. ### Integers

Suppose a1, a2, . . . , an is a list of n numbers with the following properties: The sum of those n numbers is 500. The sum of the smallest three of those numbers is 48. The sum of the largest two of those numbers is 35. (Note: There …

The sum of two numbers is 16. The difference between the two numbers is 2. What are the two numbers ?
5. ### algebra

Solve by setting up the proper equation to describe the facts given and then carrying out the mathematical calculations to solve for the unknown variable(s). The difference between two numbers is 3, and the sum of those two numbers …
6. ### algebra

production of two numbers is 19951 and sum of those two numbers is 280 (x+y=280).Without assigned those numbers find difference between them (x-y=?
7. ### math

if the sum of two numbers are 35 and the product of that two numbers are 200,then find those two numbers
8. ### Perry

The sum of two numbers is 15 the sum of the squares of the same two numbers is 172 fined the difference between the two numbers
9. ### mathematics-Algebra

I think of two whole numbers;the product of the average of the sum and difference of the numbers and the difference of the sum and difference of the numbers is 12.if three times the first added to the second makes up 11..find the two …
10. ### math

the difference between the sum of the two numbers and the difference of the two numbers is 6.Find the larger of the two numbers if their product is 15

More Similar Questions