Question 378299
<pre>
{{{expr(-1/5)(x+10)+expr(1/3)(x+3)}}}{{{""=""}}}{{{x+4}}}

Put parentheses around the right side:

{{{expr(-1/5)(x+10)+expr(1/3)(x+3)}}}{{{""=""}}}{{{(x+4)}}}

First get rid of fractions.  The LCD is 15, so multiply through the left
side by {{{red(15/1)*""}}} and the right by {{{red(15*"")}}}.

{{{red(expr(15/1))expr(-1/5)(x+10)+red(expr(15/1))expr(1/3)(x+3)}}}{{{""=""}}}{{{red(15)(x+4)}}}

Cancel away the denominators:

{{{3}}}         {{{5}}}
{{{red(expr(cross(15)/1))expr(-1/cross(5))(x+10)+red(expr(cross(15)/1))expr(1/cross(3))(x+3)}}}{{{""=""}}}{{{red(15)(x+4)}}}


{{{-3(x+10)+5(x+3)}}}{{{""=""}}}{{{15(x+4)}}}

{{{-3x-30+5x+15}}}{{{""=""}}}{{{15x+60}}}

{{{2x-15}}}{{{""=""}}}{{{15x+60}}}

{{{-13x}}}{{{""=""}}}{{{75}}}

{{{(-13x)/(-13)}}}{{{""=""}}}{{{75/(-13)}}}

{{{(cross(-13)x)/(cross(-13))}}}{{{""=""}}}{{{-75/13}}}

{{{x}}}{{{""=""}}}{{{-75/13}}}

Edwin</pre>