Question 989496

given:
{{{S=4LW+2WH}}} 
{{{S=168}}} 
{{{L=9}}} 
{{{W=4}}}

start with {{{S=4LW+2WH}}}, substitute given values

{{{168=4*9*4+2*4H}}} ....solve for {{{H}}} 

{{{168=144+8H}}}

{{{168-144=8H}}}

{{{24=8H}}}

{{{24/8=H}}}

{{{highlight(H=3)}}}


now we can check it:

{{{S=4LW+2WH}}} 

{{{168=4*9*4+2*4*3}}}

{{{168=144+24}}}

{{{168=168}}}