there are 2 numbers that have a sum 18 of but also a difference of 4 what 2 numbers are they?

Answer 1

Here's what we know:

a + b = 18 (two numbers added together equal 18)

a - b = 4 (subtracting those same numbers gets us 4)

This is a classic addition method problem where we add the two formulas together in order to remove a variable:

a + b = 18

a - b = 4

------------------

2a + 0b = 22 → 2a = 22

Isolate a. divide both sides by 2:

2a / 2 = 22 / 2

a = 11

Now to find b:

11 + b = 18

Subtract 11 from both sides:

b = 7

check:

11 - 7 = 4

4 = 4