Question

A+B=500 A-B=150 как найти A и B?

Answer 1

$+\left \{ {{a+b=500} \atop {a-b=150}} \right.\\\\------\\\\2a=650\\\\a=325\\\\b=500-a=500-325=175$

Answer 2

To find the values of A and B, you can use a system of linear equations. In this case, you have two equations:

1. A + B = 500
2. A - B = 150

There are several methods to solve a system of linear equations, but one of the easiest ways is to use the method of addition or elimination. Here's how you can do it:

Step 1: Add both equations to eliminate B. (A + B) + (A - B) = 500 + 150 2A = 650

Step 2: Solve for A by dividing both sides by 2. A = 650 / 2 A = 325

Step 3: Now that you know the value of A, you can find B by substituting A back into either of the original equations. Let's use the first equation: A + B = 500 325 + B = 500

Step 4: Solve for B by isolating it on one side of the equation. B = 500 - 325 B = 175

So, the values of A and B are A = 325 and B = 175, respectively.