Saturday 21 May 2016

ALGEBRA 1


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

x = 5y
     
x = 5y
y     y

x = 5
y    

Hence x/y = 5  answer.          

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

If  x+2y = 1            find  x/y             

    x- 2y     5

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