Question

Сумма двух чисел равна 999 а их разность равна 123, какие это числа?

Answer 1

561+438=999

561-438= 123

999 и 123

Answer 2

Let's assume the two numbers are x and y.

According to the given information:

1. The sum of two numbers is 999: x + y = 999
2. The difference between the two numbers is 123: x - y = 123

Now we have a system of equations. We can solve this system to find the values of x and y.

Let's solve the equations:

Step 1: Solve the second equation for one of the variables, say x. x = y + 123

Step 2: Substitute the value of x from Step 1 into the first equation. (y + 123) + y = 999

Step 3: Simplify and solve for y. 2y + 123 = 999 2y = 999 - 123 2y = 876 y = 876 / 2 y = 438

Step 4: Now that we have the value of y, we can find x using the second equation. x = y + 123 x = 438 + 123 x = 561

So, the two numbers are 561 and 438. Their sum is 999 (561 + 438 = 999) and their difference is 123 (561 - 438 = 123).