solve for $x$ and $y$
$2 y + 7 x = - 5$ and $5 y - 7 x = 12$

x = 1, y = 1

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x = - 1, y = - 1

No worries! We‘ve got your back. Try BYJU‘S free classes today!

x = - 1, y = 1

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None of these

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Solution

The correct option is B $x = - 1, y = 1$
$2 y + 7 x = - 5$ and $5 y - 7 x = 12$
adding both the equations
$2 y + 7 x + 5 y - 7 x = - 5 + 12$
$7 y = 7$
$y = 1$
putting value of y in first equation
$2 (1) + 7 x = - 5$
$7 x = - 5 - 2$
$7 x = - 7$
$x = - 1$

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solve for x and y2y+7x=−5 and 5y−7x=12

The correct option is B x=−1,y=12y+7x=−5 and 5y−7x=12adding both the equations2y+7x+5y−7x=−5+127y=7y=1putting value of y in first equation2(1)+7x=−57x=−5−27x=−7x=−1

solve for $x$ and $y$
$2 y + 7 x = - 5$ and $5 y - 7 x = 12$

The correct option is B $x = - 1, y = 1$
$2 y + 7 x = - 5$ and $5 y - 7 x = 12$
adding both the equations
$2 y + 7 x + 5 y - 7 x = - 5 + 12$
$7 y = 7$
$y = 1$
putting value of y in first equation
$2 (1) + 7 x = - 5$
$7 x = - 5 - 2$
$7 x = - 7$
$x = - 1$