SOLUTION: The length of a rectangle is four more than the width. The perimeter is 40 inches. Find the rectangle's measurements

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Question 226697: The length of a rectangle is four more than the width. The perimeter is 40 inches. Find the rectangle's measurements
Answer by drj(1380) About Me  (Show Source):
You can put this solution on YOUR website!
The length of a rectangle is four more than the width. The perimeter is 40 inches. Find the rectangle's measurements

Step 1. The perimeter P means adding up all the four sides of a rectangle.

Step 2. Let w be the width.

Step 3. Let w+4 be the length since the length is 4 more than the width.

Step 4. Then, P=w+w+w+4+w+4=40.

Step 5. Solving yields the following steps

Solved by pluggable solver: EXPLAIN simplification of an expression
Your Result:


YOUR ANSWER


  • This is an equation! Solutions: w=8.
  • Graphical form: Equation w%2Bw%2Bw%2B4%2Bw%2B4=40 was fully solved.
  • Text form: w+w+w+4+w+4=40 simplifies to 0=0
  • Cartoon (animation) form: simplify_cartoon%28+w%2Bw%2Bw%2B4%2Bw%2B4=40+%29
    For tutors: simplify_cartoon( w+w+w+4+w+4=40 )
  • If you have a website, here's a link to this solution.

DETAILED EXPLANATION

Look at w%2Bw%2Bw%2Bhighlight_red%28+4+%29%2Bw%2Bhighlight_red%28+4+%29=40.
Added fractions or integers together
It becomes w%2Bw%2Bw%2Bhighlight_green%28+8+%29%2Bw=40.
Look at w%2Bw%2Bw%2Bhighlight_red%28+8+%29%2Bw=40.
Moved 8 to the right of expression
It becomes w%2Bw%2Bw%2Bw%2Bhighlight_green%28+8+%29=40.
Look at .
Eliminated similar terms highlight_red%28+w+%29,highlight_red%28+w+%29,highlight_red%28+w+%29,highlight_red%28+w+%29 replacing them with highlight_green%28+%281%2B1%2B1%2B1%29%2Aw+%29
It becomes highlight_green%28+%281%2B1%2B1%2B1%29%2Aw+%29%2B8=40.
Look at .
Added fractions or integers together
It becomes %28highlight_green%28+4+%29%29%2Aw%2B8=40.
Look at highlight_red%28+%28highlight_red%28+4+%29%29%2Aw+%29%2B8=40.
Remove unneeded parentheses around factor highlight_red%28+4+%29
It becomes highlight_green%28+4+%29%2Aw%2B8=40.
Look at 4%2Aw%2B8=highlight_red%28+40+%29.
Moved these terms to the left highlight_green%28+-40+%29
It becomes 4%2Aw%2B8-highlight_green%28+40+%29=0.
Look at 4%2Aw%2Bhighlight_red%28+8+%29-highlight_red%28+40+%29=0.
Added fractions or integers together
It becomes 4%2Aw%2Bhighlight_green%28+-32+%29=0.
Look at 4%2Aw%2Bhighlight_red%28+-32+%29=0.
Removed extra sign in front of -32
It becomes 4%2Aw-highlight_green%28+32+%29=0.
Look at highlight_red%28+4%2Aw-32+%29=0.
Solved linear equation highlight_red%28+4%2Aw-32=0+%29 equivalent to 4*w-32 =0
It becomes highlight_green%28+0+%29=0.
Result: 0=0
This is an equation! Solutions: w=8.

Universal Simplifier and Solver


Done!



For w=8 , then w+4=12 and P=2(8+12)=40 which is a true statement.

Step 6. ANSWER: The width is 8 inches and the length is 12 inches.

I hope the above steps were helpful.

For free Step-By-Step Videos on Introduction to Algebra, please visit http://www.FreedomUniversity.TV/courses/IntroAlgebra or for Trigonometry visit http://www.FreedomUniversity.TV/courses/Trigonometry.

And good luck in your studies!

Respectfully,
Dr J

drjctu@gmail.com

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