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4x+6y=3xy, 8x+9y=5xy

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4x+6y=3xy, 8x+9y=5xy

Posted by Rubi Bano 8 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Hans Raj 8 years, 4 months ago

Let us try to make 8x in both equations

Therefore multiply equation with 4x by 2 to make it = 8x

2 x (4x + 6y = 3xy)

8 x + 12 y = 6 xy .............. i

8x + 9y = 5xy ....................... ii

i - ii

3y = xy

3 = x

Putting the value of x in ii

24 + 9y = 5x3y

24 = 15y - 9y

24 = 6y

y = 4

x = 3

0Thank You

Jay Jajoo 8 years, 4 months ago

Multiply 1st equation by 2 Then subtract equation 2 from equation 1 ( multiplied by 2 ) We will get x=3 and y=4

0Thank You

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CBSE > Class 10 > Mathematics