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How do you solve by substitution $x + y = 0$ $x+y=0$ and ?

1 Answer

Jun 23, 2015

Substitute $(- x)$ $(-x)$ for each occurrence of $y$ $y$ in whatever equation is supplied by "?"; simplify to find the value of $x$ $x$ ; then, equate $y$ $y$ to the value of $(- x)$ $(-x)$ .

Explanation:

If $x + y = 0$ $x+y = 0$
then
$XXXX$ $color(white)("XXXX")$ $y = - x$ $y = -x$

(If, on the other hand, you did not mean for "?" to be a general indication of any non-specific, other equation, either fix the question or re-ask.

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