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If x=3k-2, y=2k is a solution …

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If x=3k-2, y=2k is a solution of equation 4x-7y+12=0,then find the value of K.

Posted by Sadhna Kashyap 8 years, 4 months ago

CBSE > Class 09 > Mathematics

2 answers

Naveen Sharma 8 years, 4 months ago

Ans.

Given : x = 3k - 2 and y = 2k is solution of eq. 4x -7y + 12 =0

To Find: value of k

Solution :

put value of x and y in eq., we get

4(3k-2) - 7(2k) + 12 = 0

=> 12k - 8 - 14k + 12 =0

=> -2k + 4 = 0

=> 2k = 4

=> k = 2

Value of k = 2

1Thank You

Rashmi Bajpayee 8 years, 4 months ago

Putting the given values of x and y in equation

4x + 7y + 12 = 0

4 + 3k + 7 × 2k + 12 = 0

12k + 14k + 12 = 0

26k = -12

k = -6/13

0Thank You

ANSWER

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CBSE > Class 09 > Mathematics