Solve the following systems of equation:
$11 x + 15 y + 23 = 0$
$7 x - 2 y + 220 = 0$

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Solution

Equation (1) $\times 7 : 77 x + 105 y + 161 = 0$

Equation (2) $\times 11 : 77 x - 22 y + 2420 = 0$

Subtract two equations ;

$\Rightarrow 127 y = 2259$

$\Rightarrow y = \frac{2259}{127}$

Substitute y in equation 1;

$\Rightarrow x = \frac{- 3346}{127}$

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Similar questions

Solve the following systems of equations: $11 x + 15 y + 23 = 0$

$7 x - 2 y - 20 = 0$

11 x + 15 y + 23 = 0

7 x - 2 y - 20 = 0

Solve: $7 x - 2 y = 20$

$11 x + 15 y + 23 = 0$

x

y

11 x + 15 y + 23 = 0, 7 x - 2 y - 20 = 0

11 x + 15 y + 23 = 0, 7 x - 2 y - 20 = 0 .

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