Question

Find the value of determinant D for the simultaneous equations

3a + 5b = 26 ; a + 5b = 22​

Answer 1

Answer:

a=2

b=4

Step-by-step explanation:

5b=26-3a

b=26-3a/5...............................1

b=22-a/5...................................2

from 1and 2

or,26-3a/5=22-a/5

or ,26-22=-a+3a

or,4=2a

or,a=2

b=26-3*2/5

b=4_ans

Answer 2

Step-by-step explanation:

3a+5b=26 ......................(i)

a+5b=22 ........................(ii)

(i)−(ii)⟹2a=4

∴a=2

from(ii)⟹2+5b=22

⟹5b=20

∴b=4

Hence solution is (a,b)=(2,4)