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2x+3y=9 3x+4y=5

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2x+3y=9 3x+4y=5

Posted by Ritesh Yadav 5 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years, 6 months ago

Given: 2x +3y = 9 _______(1),

3x + 4y = 5 ______(2)

From (1) 2x = 9 – 3y

{tex} x=\frac{9-3 y}{2}{/tex} ______ (3)

Substitute (3) in (2)

{tex}3\left(\frac{9-3 y}{2}\right)+4 y=5\\\\\left(\frac{27-9 y}{2}\right)+4 y=5{/tex}

27 – 9y + 8y = 10

27 – 10 = y

y = 17 ______(4)

Substitute (4) in (1)

2x +3(17) = 9

2x = 9 – 51

2x = -42

x = -21 and y = 17

0Thank You

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CBSE > Class 10 > Mathematics