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Solve the following pairs of linear equation by elimination method 5x-4y=-8 , 7x+6y=9

Posted by Aakanksha Gupta 4 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Adithya Dev A 4 years, 5 months ago

[(5x - 4y = -8) * 3] + [(7x + 6y = 9)] * 2 ==> (15x - 12y = -24.) + (14x + 12y = 18.) ==> 29x = -6. ==> x = -6/29// Therefore, y = 9 - 7x /6 = 9 + 42/29 / 6 = (261 + 42/29) / 6 = 303 / 174 = 101/58//

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CBSE > Class 10 > Mathematics