I got this from the website www.gomath.com
The length of a rectangle is 12 cm more than the width. The perimeter is 44cm. What is the dimension of the rectangle in cm?
Here is the answer:
Let x = width in cm.
Then x + 12 = length in cm
Therefore
2[x + (x + 12)] = 44
4x + 24 = 44
x = 5, x + 12 = 17
Just dont know where the 5 comes from?
Thanks
2006-10-04 09:43:42 · 3 answers · asked by Anonymous in Education & Reference ➔ Homework Help
When it says 4x + 24=44, you subtract 24 from each side, therefore 4x=20. Then divide both sides by 4. So x=5
2006-10-04 09:47:14 · answer #1 · answered by ~~kelly~~ 6 · 0⤊ 0⤋
As stated
4x + 24 = 44
then: 4x = 20
then: x = 5.
the 5 is the result after solving the equation.
2006-10-04 16:50:23 · answer #2 · answered by jclcheng777 2 · 0⤊ 0⤋
2[x + (x + 12)] = 44
4x + 24 = 44
The skipped a step right here (subtract 24 from both sides)
4x=20
x=5
2006-10-04 16:47:28 · answer #3 · answered by Anonymous · 0⤊ 0⤋