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3 years ago

The sum of two numbers is 12. If one number is subtracted from the other, their difference is -2. Find the numbers

Mathematics

2 answers:

adoni [48]3 years ago

8 0

The first number is 5
the 2nd number is 7

sertanlavr [38]3 years ago

3 0

We can solve this by setting up a system of equations. x and y will represent the two numbers.
x+y = 12
x-y = -2
Personally, I'm going to solve the system by solving one of the equations for x and substituting it into the other one.
x = 12-y
12-y-y = -2
12-2y = -2
-2y = -14
y = 7

Now find the other number by plugging 7 in for y in one of the equations.
x+7 = 12
x = 5
OR
x-7 = -2
x = 5

So, the two numbers are 5 and 7.

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