How do you solve the system $4 x + 2 y = 7$ $4x+2y=7$ and $y = - 2 x + 5$ $y= -2x+5$ ?

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How do you solve the system $4 x + 2 y = 7$ $4x+2y=7$ and $y = - 2 x + 5$ $y= -2x+5$ ?

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Answer 1 · 2015-05-18T18:08:33

You cannot find solutions of your system because the two equations represent two parallel lines (they have the same slope of -2)!
The first equation has the coefficients of $x$ $x$ and $y$ $y$ obtained multiplying the correspondent coefficients of the second equation by $2$ $2$ !
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How do you solve the system $4 x + 2 y = 7$ $4x+2y=7$ and $y = - 2 x + 5$ $y= -2x+5$ ?

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How do you solve the system $4 x + 2 y = 7$ $4x+2y=7$ and $y = - 2 x + 5$ $y= -2x+5$ ?