How do you solve the system $x+5y=2$ and $x-1=2y$ ?

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Answer 1 · 2015-05-19T14:30:14

You can isolate one variable in one equation and, then, substitute its value in the other equation:

Let's isolate $x$ in the first equation, for example.

$x=2-5y$

Now, substituting it:

$(2-5y)-1=2y$
$1=7y$
$y=1/7$

Now, as we know $x=2-5y$ and $y=1/7$ ,

$x=2-5(1/7)$
$x=2-5/7$
$x=9/7$

How do you solve the system x+5y=2x+5y=2 and x-1=2yx-1=2y?