Question

47 x + 31 y = 63
31 x + 47y = 15​

Answer 1

Answer:

equation 1 - equation 2

47x+ 31y = 63 -

31x + 47y = 15

16x - 16y = 48

16(x-y) = 48

x-y = 3 ---- equation 3

in order to get y, multiply eq.3 with 47 ;

47x -47y = 141 ---equation4

now, eq1 - eq 4

47x+ 31y = 63 -

47x - 47y = 141

78y = -78

y = -1

putting y = -1 in eq3

x-y = 3

x - (-1) = 3

x+1 =3

x = 2

x=2, y = -1