Tuesday, 12 April 2016

ALGEBRA-3


If  x+5y = 1            find  x/y             
    x-3y     4

solution

x+5y = 1            
x-3y    4

1(x-3y) = 4(x+5y)           [after cross multiplying]

x-3y = 4x+20y

x - 4x = 20y + 3y

-3x = 23y

1-3x = 23y
1-3      -3

 X = -23y/3

x/y = -23/3        [after dividing by y on both sides]


x = -23/3
y    

Hence x/y = -23/3  answer.           

TRY THIS......................

If  x+2y = 1            find  x/y             

   x- 2y     5

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