Question 999991
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Hello, Iam trying to show
the work for system of equations by the substitution method, can you help please? Here are the two equations.
4x+y=11
2x+5y=1
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        The solution in the post by @mananth is incorrect due to an arithmetic error.

        I came to bring a correct solution.



<pre>
From the first equation, express

    4x + y = 11,

express  y = 11 - 4x  and substitute it into the second equation

    2x + 5(11-4x) = 1.

This is an equation for single variable 'x'.  Simplify and find 'x'.

    2x + 55 - 20x =   1

        -18x      = -54

           x = -54/-18

           x = 3

plug  x= 3  in  y = 11 - 4x

                y = 11 - 4*3

                y = -1

<U>ANSWER</U>.  x = 3,  y = -1.


You may check that this answer is correct by substituting the values into original equations.
</pre>

Solved correctly.