Question 1091339

The area of a rectangle is {{{42}}} square inches:{{{LW=42}}}...eq.1 
 the length is {{{3}}} times the width:{{{L=3W}}} ...eq.2

{{{LW=42}}}....substitute {{{L}}} 

{{{3W*W=42}}}

{{{3W^2=42}}}

{{{W^2=42/3}}}

{{{W^2=14}}}

{{{W=sqrt(14)}}}

{{{W=3.741657386773941}}}

{{{W=3.74}}}

{{{L=3W}}}
{{{L=3*3.74}}}
{{{L=11.22}}}

the dimensions of the rectangle are: {{{L=11.22}}}inches and {{{W=3.74}}} inches