Question

Solve the pair of linear equations 21x+47y=110 and 47x+21y=162

Answer 1

Answer:

21x+47y=110. (I)

47x +21y=162. (2)

Add(i) and (2)

68x +68y=272

x + y = 4. (3)

subtract (1) from(2)

26x-26y=52.

x-y=2. . (4)

Add (3) and (4)

2x = 6,x=6/2=3

x+y=4

Putx=3, 3 +y=4

y=4-3=1

x = 3, y=l