How do solve the following linear system?: $x - 7 y = 4, - 2 x + 5 y = - 3$ $x-7y=4 , -2x+5y=-3$ ?

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How do solve the following linear system?: $x - 7 y = 4, - 2 x + 5 y = - 3$ $x-7y=4 , -2x+5y=-3$ ?

1 Answer

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Answer 1 · 2018-06-05T11:38:37

$x = \frac{1}{9}, y = - \frac{5}{9}$ $x=1/9,y=-5/9$

Explanation:

Multiplying the first equation by $2$ $2$ and adding to the second:
$- 9 y = 5$ $-9y=5$
so $y = - \frac{5}{9}$ $y=-5/9$
Plugging this in the first equation
$x - 7 (- \frac{5}{9}) = 4$ $x-7(-5/9)=4$
$x = 4 - \frac{35}{9} = \frac{36 - 35}{9}$ $x=4-35/9=(36-35)/9$
so $x = \frac{1}{9}$ $x=1/9$

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How do solve the following linear system?: $x - 7 y = 4, - 2 x + 5 y = - 3$ $x-7y=4 , -2x+5y=-3$ ?

1 Answer

Explanation:

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Science

Math

Humanities

... and beyond

How do solve the following linear system?: x−7y=4,−2x+5y=−3 x-7y=4 , -2x+5y=-3 ?

1 Answer

Explanation:

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How do solve the following linear system?: $x - 7 y = 4, - 2 x + 5 y = - 3$ $x-7y=4 , -2x+5y=-3$ ?