If you want to stick to integers:
1 x 18 = 18
2 x 9 = 18
3 x 6 = 18
-1 x -18 = 18
-2 x -9 = 18
-3 x -6 = 18
To find two numbers that add up to 18, we can set up an algebraic equation. Let's call the two numbers x and y. The equation we need to solve is x + y = 18. Since we are looking for two numbers that add up to 18, there are multiple possible solutions. For example, one possible pair of numbers that add up to 18 is 10 and 8, as 10 + 8 = 18.
The two numbers that add up to -36 and multiply to 324 are -18 and -18. This is because -18 + -18 equals -36, and -18 * -18 equals 324.
The two numbers that multiply to 18 and add up to 3 are 6 and -3. When multiplied, 6 × -3 equals -18, and when added, 6 + (-3) equals 3.
18
288. All multiples of 9 will have digits that add to a multiple of 9. To get a multiple of 9 to be all even, you need to get them to add to 18, since no set of even numbers will add up to 9. 288 is the lowest multiple of 9 to be able to add to 18. ■
Let's denote the two numbers as x and y. We can set up a system of equations: x + y = 18 and x - y = 4. By solving this system simultaneously, we can find that x = 11 and y = 7. Therefore, the two numbers that add up to 18 and subtract to 4 are 11 and 7.
-180
-22
120 + 138
10 and 8
The numbers are 17 and 18.
113