Question

a+ b = 11 , 3a-b = -3 find a and b​

Answer 1

Answer:

a = -7

b = 18

Step-by-step explanation:

a + b = 11 .. (1)

3a - b = -3 ... (2)

On subtracting (1) and (2) we get,

- 2a = 11 +3

=> a = -7

put a = - 7 in 1

b = 11+7 = 18

Answer 2

$\huge\tt\colorbox{orange}{Answer}$

$a + b = 11 \\ a = 11 - b$

$3a - b = - 3 \\ 3(11 - b) - b = - 3 \\ 33 - 3b - b = - 3 \\ 33 - 4b = - 3 \\ - 4b = - 3 - 33 \\ - 4b = - 36 \\ b = \frac{36}{4} \\ \\ b = 9$

$a = 11 - b \\ a = 11 - 9 \\ a = 2$

$so \: \: \: a = 2 \: \: and \: \: b = 9$