Question 329046
{{{A+2B+2C=27}}}
{{{A+B+C=16}}}
{{{2A+B+2C=27}}}
<p>
{{{A+B+C=16}}} multiply by 2
{{{2A+2B+2C=32}}}
{{{2A+B+2C=27}}}subtract
{{{highlight(B=5)}}}
<p>
{{{A+B+C=16}}} multiply by 2
{{{2A+2B+2C=32}}}
{{{A+2B+2C=27}}}subtract
{{{highlight(A=5)}}}
<p>
{{{A+B+C=16}}} substitute 
{{{5+5+C=16}}} add
{{{10+C=16}}} subtract 10
{{{highlight(C=6)}}}