3y + 3x = 3_____3(y + x) = 3(1)_____y + x = 1______y = 1 - x ------- eq (i)

2y + 6x = 2_____2(y + 3x) = 2(1)______y + 3x = 1 ------ eq (ii)

1 - x + 3x = 1 ------- Substituting 1 - x for y in eq (ii)

- x + 3x = 1 - 1

2x = 0

x = , or 



y = 1 - 0 ------- Substituting 0 for x in eq (i)

 

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