Question 741771
<pre>
For the following system, if you isolated x in the first equation to use the Substitution Method, what expression
would you substitute into the second equation?

&#8722;x + 2y = 9
4x + 5y = 9

&#8722;  x + 2y = 9
<font color = red><font size  = 4><b>
+ x - 9 - 9 + x ----- Adding "x" to, and subtracting 9 from both sides
 2y - 9 = x</font></font></b><font color = blue><font size  = 4><b> <=== 1st equation solved for "x" </font></font></b></pre>