Question

47x+31y=63
31x+47y=15

Answer 1

Answer:

Step-by-step explanation:47x+31y=63———1

31x+47y=15——-2

Add eq 1 and 2

47x+31y=63

31x+47y=15

___________

78x+78y=78

Divide by 78

X+y=1——3

Subtract eq 1and2

47x+31y=63

31x+47y=15

- - -

_________

16x-16y=48

Divide by 16

X-y=3——-4

Add eq 3and4

x+y=1

x-y=3

————

X=4

Put x=4in eq 3

x+y=1

4+y=1

y=1-4

y=-3

(x,y) =(4,-3)

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Answer 2

( 2,-1 ) is the solution of the given simultaneous equations