Question

if a+b =18 and a-b =6 find a and b​

Answer 1

Answer:

a=4

b=2

Step-by-step explanation:

Let's start with your equations . -

a + b = 6 --------- (1)

a - b = 2 ----------(2)

First we add both equations.

adding equations (1) and (2),

We get -

(a+b) + (a-b) = 6+2

a + b + a - b = 8

This 'b' and '-b' becomes zero after addition,

Then we get -

2a = 8

a = 8/2

a = 4 (We get the value of a)

Now we get the value of a. Let's move on 'b'

First we put value of 'a' in equation (1)

Put value of 'a' in equation (1)

4 + b = 6

b = 6 - 4

b = 2 (That's the value of b)