Question 153049
"lenght of a rectangle is 5cm longer than three times its width"
1.{{{L=5+3W}}}
"The perimeter is 74cm."
2.{{{2L+2W=74}}}
Use eq. 1 in eq. 2 and solve for W.
1.{{{L=5+3W}}}
"The perimeter is 74cm."
2.{{{2L+2W=74}}}
{{{2(5+3W)+2W=74}}}
{{{10+6W+2W=74}}}
{{{8W=64}}}
{{{W=8}}}
From 1,
1.{{{L=5+3W}}}
{{{L=5+3(8)}}}
{{{L=5+24}}}
{{{L=29}}}