Problem Solving: Writing Tow-Step Equations

[Guest]

The Length of a rectangle is four times its width. Its perimeter is 90m. Find its dimensions. Use P = 2L + 2w

 

[tkhunny]

The Length of a rectangle is four times its width.

Use this clue to determine that L = 4*w.

Its perimeter is 90m.

Use this clue to determine that 2*L + 2*w = 90 m

Now what?