Question 1178089
<pre>a-2b=9 2a-3b=4</pre>


{{{system(a-2b=9,2a-3b=4)}}}


{{{system(2a-4b=18,2a-3b=4)}}}

E1-E2:

{{{-b=14}}}

{{{highlight(b=-14)}}}

-

{{{a=9+2b}}}

{{{a=9+2*14}}}

{{{highlight(a=37)}}}