Question

a+b =4, a-b=3 a = ? b= ?​

Answer 1

Answer:

Given,

$a + b = 4 \\ \: \: \: \: \: \: \: \: \: \: a = 4 - b \: \: \: \: \ \: \: \: (i)$

Putting the value of ‘a’ in equation (ii),

$\: \: \: \: \: \: (4 - b) - b = 3 \\ 4 - 2b = 3 \\ 2b = 4 - 3 \\ 2b = 1 \\ b \: = \: \frac{1}{2}$

Taking this value of ‘b’ in equation (i), we get,

$a = 4 - \frac{1}{2} \\ a = \frac{(8 - 1)}{2} \\ \\ a = \frac{7}{2}$

∴ a = 7/2, b = 1/2

Hope It Helps:)