Question 1031819
w, the width of the original rectangle.
Length described as 2w+8.
Area, {{{w(2w+8)}}}.


New rectangle of width 3w.
Length unchanged, 2w+8.
Area, {{{3w(2w+8)}}}.


Increase of area is 30 square inches.
{{{3w(2w+8)-w(2w+8)=30}}}

Simplify and solve.